diff --git a/src/ReactiveUI.Validation.AndroidX/Extensions/ViewForExtensions.cs b/src/ReactiveUI.Validation.AndroidX/Extensions/ViewForExtensions.cs
index de9c5536..259496b4 100644
--- a/src/ReactiveUI.Validation.AndroidX/Extensions/ViewForExtensions.cs
+++ b/src/ReactiveUI.Validation.AndroidX/Extensions/ViewForExtensions.cs
@@ -1,4 +1,4 @@
-// Copyright (c) 2024 .NET Foundation and Contributors. All rights reserved.
+// Copyright (c) 2025 .NET Foundation and Contributors. All rights reserved.
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for full license information.
diff --git a/src/ReactiveUI.Validation.AndroidX/ReactiveUI.Validation.AndroidX.csproj b/src/ReactiveUI.Validation.AndroidX/ReactiveUI.Validation.AndroidX.csproj
index 3f5a4146..c19d6ed3 100644
--- a/src/ReactiveUI.Validation.AndroidX/ReactiveUI.Validation.AndroidX.csproj
+++ b/src/ReactiveUI.Validation.AndroidX/ReactiveUI.Validation.AndroidX.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFrameworks>net8.0-android</TargetFrameworks>
+    <TargetFrameworks>net8.0-android;net9.0-android</TargetFrameworks>
     <PackageDescription>Provides ReactiveUI.Validation extensions for the AndroidX Library</PackageDescription>
     <PackageId>ReactiveUI.Validation.AndroidX</PackageId>
     <NoWarn>$(NoWarn);CS1591</NoWarn>
@@ -9,7 +9,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="ReactiveUI.AndroidX" Version="20.4.1" />
+    <PackageReference Include="ReactiveUI.AndroidX" Version="21.0.1" />
   </ItemGroup>
 
   <ItemGroup>
diff --git a/src/ReactiveUI.Validation.Tests/API/ApiApprovalTests.ValidationProject.DotNet9_0.verified.txt b/src/ReactiveUI.Validation.Tests/API/ApiApprovalTests.ValidationProject.DotNet9_0.verified.txt
new file mode 100644
index 00000000..1bd00054
--- /dev/null
+++ b/src/ReactiveUI.Validation.Tests/API/ApiApprovalTests.ValidationProject.DotNet9_0.verified.txt
@@ -0,0 +1,272 @@
+[assembly: System.Runtime.Versioning.TargetFramework(".NETCoreApp,Version=v9.0", FrameworkDisplayName=".NET 9.0")]
+namespace ReactiveUI.Validation.Abstractions
+{
+    public interface IValidatableViewModel
+    {
+        ReactiveUI.Validation.Contexts.IValidationContext ValidationContext { get; }
+    }
+}
+namespace ReactiveUI.Validation.Collections
+{
+    public interface IValidationText : System.Collections.Generic.IEnumerable<string>, System.Collections.Generic.IReadOnlyCollection<string>, System.Collections.Generic.IReadOnlyList<string>, System.Collections.IEnumerable
+    {
+        string ToSingleLine(string? separator = ",");
+    }
+    public static class ValidationText
+    {
+        public static readonly ReactiveUI.Validation.Collections.IValidationText Empty;
+        public static readonly ReactiveUI.Validation.Collections.IValidationText None;
+        public static ReactiveUI.Validation.Collections.IValidationText Create(System.Collections.Generic.IEnumerable<ReactiveUI.Validation.Collections.IValidationText>? validationTexts) { }
+        public static ReactiveUI.Validation.Collections.IValidationText Create(System.Collections.Generic.IEnumerable<string?>? validationTexts) { }
+        public static ReactiveUI.Validation.Collections.IValidationText Create(string? validationText) { }
+        public static ReactiveUI.Validation.Collections.IValidationText Create(params string?[]? validationTexts) { }
+    }
+}
+namespace ReactiveUI.Validation.Comparators
+{
+    public class ValidationStateComparer : System.Collections.Generic.EqualityComparer<ReactiveUI.Validation.States.IValidationState>
+    {
+        public ValidationStateComparer() { }
+        public override bool Equals(ReactiveUI.Validation.States.IValidationState? x, ReactiveUI.Validation.States.IValidationState? y) { }
+        public override int GetHashCode(ReactiveUI.Validation.States.IValidationState obj) { }
+    }
+}
+namespace ReactiveUI.Validation.Components.Abstractions
+{
+    public interface IPropertyValidationComponent : ReactiveUI.Validation.Components.Abstractions.IValidatesProperties, ReactiveUI.Validation.Components.Abstractions.IValidationComponent { }
+    public interface IValidatesProperties
+    {
+        System.Collections.Generic.IEnumerable<string> Properties { get; }
+        int PropertyCount { get; }
+        bool ContainsPropertyName(string propertyName, bool exclusively = false);
+    }
+    public interface IValidationComponent
+    {
+        bool IsValid { get; }
+        ReactiveUI.Validation.Collections.IValidationText? Text { get; }
+        System.IObservable<ReactiveUI.Validation.States.IValidationState> ValidationStatusChange { get; }
+    }
+}
+namespace ReactiveUI.Validation.Components
+{
+    public abstract class BasePropertyValidation<TViewModel> : ReactiveUI.ReactiveObject, ReactiveUI.Validation.Components.Abstractions.IPropertyValidationComponent, ReactiveUI.Validation.Components.Abstractions.IValidatesProperties, ReactiveUI.Validation.Components.Abstractions.IValidationComponent, System.IDisposable
+    {
+        protected BasePropertyValidation() { }
+        public bool IsValid { get; }
+        public System.Collections.Generic.IEnumerable<string> Properties { get; }
+        public int PropertyCount { get; }
+        public ReactiveUI.Validation.Collections.IValidationText? Text { get; }
+        public System.IObservable<ReactiveUI.Validation.States.IValidationState> ValidationStatusChange { get; }
+        protected void AddProperty<TProp>(System.Linq.Expressions.Expression<System.Func<TViewModel, TProp>> property) { }
+        public bool ContainsPropertyName(string propertyName, bool exclusively = false) { }
+        public void Dispose() { }
+        protected virtual void Dispose(bool disposing) { }
+        protected abstract System.IObservable<ReactiveUI.Validation.States.IValidationState> GetValidationChangeObservable();
+    }
+    public sealed class BasePropertyValidation<TViewModel, TViewModelProperty> : ReactiveUI.Validation.Components.BasePropertyValidation<TViewModel>
+    {
+        public BasePropertyValidation(TViewModel viewModel, System.Linq.Expressions.Expression<System.Func<TViewModel, TViewModelProperty?>> viewModelProperty, System.Func<TViewModelProperty?, bool> isValidFunc, System.Func<TViewModelProperty?, string> message) { }
+        public BasePropertyValidation(TViewModel viewModel, System.Linq.Expressions.Expression<System.Func<TViewModel, TViewModelProperty?>> viewModelProperty, System.Func<TViewModelProperty?, bool> isValidFunc, System.Func<TViewModelProperty?, bool, string> messageFunc) { }
+        public BasePropertyValidation(TViewModel viewModel, System.Linq.Expressions.Expression<System.Func<TViewModel, TViewModelProperty?>> viewModelProperty, System.Func<TViewModelProperty?, bool> isValidFunc, string message) { }
+        protected override void Dispose(bool disposing) { }
+        protected override System.IObservable<ReactiveUI.Validation.States.IValidationState> GetValidationChangeObservable() { }
+    }
+    public abstract class ObservableValidationBase<TViewModel, TValue> : ReactiveUI.ReactiveObject, ReactiveUI.Validation.Components.Abstractions.IPropertyValidationComponent, ReactiveUI.Validation.Components.Abstractions.IValidatesProperties, ReactiveUI.Validation.Components.Abstractions.IValidationComponent, System.IDisposable
+    {
+        protected ObservableValidationBase(System.IObservable<ReactiveUI.Validation.States.IValidationState> observable) { }
+        protected ObservableValidationBase(TViewModel viewModel, System.IObservable<TValue> observable, System.Func<TViewModel, TValue, bool> isValidFunc, System.Func<TViewModel, TValue, bool, ReactiveUI.Validation.Collections.IValidationText> messageFunc) { }
+        public bool IsValid { get; }
+        public System.Collections.Generic.IEnumerable<string> Properties { get; }
+        public int PropertyCount { get; }
+        public ReactiveUI.Validation.Collections.IValidationText? Text { get; }
+        public System.IObservable<ReactiveUI.Validation.States.IValidationState> ValidationStatusChange { get; }
+        protected void AddProperty<TProp>(System.Linq.Expressions.Expression<System.Func<TViewModel, TProp>> property) { }
+        public bool ContainsPropertyName(string propertyName, bool exclusively = false) { }
+        public void Dispose() { }
+        protected virtual void Dispose(bool disposing) { }
+    }
+    public sealed class ObservableValidation<TViewModel, TValue> : ReactiveUI.Validation.Components.ObservableValidationBase<TViewModel, TValue>
+    {
+        public ObservableValidation(System.IObservable<ReactiveUI.Validation.States.IValidationState> observable) { }
+        public ObservableValidation(TViewModel viewModel, System.IObservable<TValue> observable, System.Func<TValue, bool> isValidFunc, System.Func<TValue, string> messageFunc) { }
+        public ObservableValidation(TViewModel viewModel, System.IObservable<TValue> observable, System.Func<TValue, bool> isValidFunc, string message) { }
+        public ObservableValidation(TViewModel viewModel, System.IObservable<TValue> observable, System.Func<TViewModel, TValue, bool> isValidFunc, System.Func<TViewModel, TValue, string> messageFunc) { }
+        public ObservableValidation(TViewModel viewModel, System.IObservable<TValue> observable, System.Func<TViewModel, TValue, bool> isValidFunc, System.Func<TViewModel, TValue, bool, string> messageFunc) { }
+        public ObservableValidation(TViewModel viewModel, System.IObservable<TValue> observable, System.Func<TViewModel, TValue, bool> isValidFunc, string message) { }
+    }
+    public sealed class ObservableValidation<TViewModel, TValue, TProp> : ReactiveUI.Validation.Components.ObservableValidationBase<TViewModel, TValue>
+    {
+        public ObservableValidation(System.Linq.Expressions.Expression<System.Func<TViewModel, TProp>> viewModelProperty, System.IObservable<ReactiveUI.Validation.States.IValidationState> observable) { }
+        public ObservableValidation(TViewModel viewModel, System.Linq.Expressions.Expression<System.Func<TViewModel, TProp>> viewModelProperty, System.IObservable<TValue> observable, System.Func<TValue, bool> isValidFunc, System.Func<TValue, string> messageFunc) { }
+        public ObservableValidation(TViewModel viewModel, System.Linq.Expressions.Expression<System.Func<TViewModel, TProp>> viewModelProperty, System.IObservable<TValue> observable, System.Func<TValue, bool> isValidFunc, string message) { }
+        public ObservableValidation(TViewModel viewModel, System.Linq.Expressions.Expression<System.Func<TViewModel, TProp>> viewModelProperty, System.IObservable<TValue> observable, System.Func<TViewModel, TValue, bool> isValidFunc, System.Func<TViewModel, TValue, string> messageFunc) { }
+        public ObservableValidation(TViewModel viewModel, System.Linq.Expressions.Expression<System.Func<TViewModel, TProp>> viewModelProperty, System.IObservable<TValue> observable, System.Func<TViewModel, TValue, bool> isValidFunc, System.Func<TViewModel, TValue, bool, string> messageFunc) { }
+        public ObservableValidation(TViewModel viewModel, System.Linq.Expressions.Expression<System.Func<TViewModel, TProp>> viewModelProperty, System.IObservable<TValue> observable, System.Func<TViewModel, TValue, bool> isValidFunc, string message) { }
+    }
+}
+namespace ReactiveUI.Validation.Contexts
+{
+    public interface IValidationContext : ReactiveUI.IReactiveObject, ReactiveUI.Validation.Components.Abstractions.IValidationComponent, Splat.IEnableLogger, System.ComponentModel.INotifyPropertyChanged, System.ComponentModel.INotifyPropertyChanging, System.IDisposable, System.Reactive.Disposables.ICancelable
+    {
+        System.IObservable<bool> Valid { get; }
+        DynamicData.IObservableList<ReactiveUI.Validation.Components.Abstractions.IValidationComponent> Validations { get; }
+        void Add(ReactiveUI.Validation.Components.Abstractions.IValidationComponent validation);
+        bool GetIsValid();
+        void Remove(ReactiveUI.Validation.Components.Abstractions.IValidationComponent validation);
+        void RemoveMany(System.Collections.Generic.IEnumerable<ReactiveUI.Validation.Components.Abstractions.IValidationComponent> validations);
+    }
+    public class ValidationContext : ReactiveUI.ReactiveObject, ReactiveUI.IReactiveObject, ReactiveUI.Validation.Components.Abstractions.IValidationComponent, ReactiveUI.Validation.Contexts.IValidationContext, Splat.IEnableLogger, System.ComponentModel.INotifyPropertyChanged, System.ComponentModel.INotifyPropertyChanging, System.IDisposable, System.Reactive.Disposables.ICancelable
+    {
+        public ValidationContext(System.Reactive.Concurrency.IScheduler? scheduler = null) { }
+        public bool IsDisposed { get; }
+        public bool IsValid { get; }
+        public ReactiveUI.Validation.Collections.IValidationText Text { get; }
+        public System.IObservable<bool> Valid { get; }
+        public System.IObservable<ReactiveUI.Validation.States.IValidationState> ValidationStatusChange { get; }
+        public DynamicData.IObservableList<ReactiveUI.Validation.Components.Abstractions.IValidationComponent> Validations { get; }
+        public void Add(ReactiveUI.Validation.Components.Abstractions.IValidationComponent validation) { }
+        public void Dispose() { }
+        protected virtual void Dispose(bool disposing) { }
+        public bool GetIsValid() { }
+        public void Remove(ReactiveUI.Validation.Components.Abstractions.IValidationComponent validation) { }
+        public void RemoveMany(System.Collections.Generic.IEnumerable<ReactiveUI.Validation.Components.Abstractions.IValidationComponent> validations) { }
+    }
+}
+namespace ReactiveUI.Validation.Extensions
+{
+    public static class ValidatableViewModelExtensions
+    {
+        public static void ClearValidationRules<TViewModel>(this TViewModel viewModel)
+            where TViewModel : ReactiveUI.IReactiveObject, ReactiveUI.Validation.Abstractions.IValidatableViewModel { }
+        public static void ClearValidationRules<TViewModel, TViewModelProp>(this TViewModel viewModel, System.Linq.Expressions.Expression<System.Func<TViewModel, TViewModelProp>> viewModelProperty)
+            where TViewModel : ReactiveUI.IReactiveObject, ReactiveUI.Validation.Abstractions.IValidatableViewModel { }
+        public static System.IObservable<bool> IsValid<TViewModel>(this TViewModel viewModel)
+            where TViewModel : ReactiveUI.IReactiveObject, ReactiveUI.Validation.Abstractions.IValidatableViewModel { }
+        public static ReactiveUI.Validation.Helpers.ValidationHelper ValidationRule<TViewModel>(this TViewModel viewModel, System.IObservable<ReactiveUI.Validation.States.IValidationState> validationObservable)
+            where TViewModel : ReactiveUI.IReactiveObject, ReactiveUI.Validation.Abstractions.IValidatableViewModel { }
+        public static ReactiveUI.Validation.Helpers.ValidationHelper ValidationRule<TViewModel>(this TViewModel viewModel, System.IObservable<bool> validationObservable, string message)
+            where TViewModel : ReactiveUI.IReactiveObject, ReactiveUI.Validation.Abstractions.IValidatableViewModel { }
+        public static ReactiveUI.Validation.Helpers.ValidationHelper ValidationRule<TViewModel, TValue>(this TViewModel viewModel, System.IObservable<TValue> validationObservable)
+            where TViewModel : ReactiveUI.IReactiveObject, ReactiveUI.Validation.Abstractions.IValidatableViewModel
+            where TValue : ReactiveUI.Validation.States.IValidationState { }
+        public static ReactiveUI.Validation.Helpers.ValidationHelper ValidationRule<TViewModel, TViewModelProp>(this TViewModel viewModel, System.Linq.Expressions.Expression<System.Func<TViewModel, TViewModelProp>> viewModelProperty, System.IObservable<ReactiveUI.Validation.States.IValidationState> validationObservable)
+            where TViewModel : ReactiveUI.IReactiveObject, ReactiveUI.Validation.Abstractions.IValidatableViewModel { }
+        public static ReactiveUI.Validation.Helpers.ValidationHelper ValidationRule<TViewModel, TValue>(this TViewModel viewModel, System.IObservable<TValue> validationObservable, System.Func<TValue, bool> isValidFunc, System.Func<TValue, string> messageFunc)
+            where TViewModel : ReactiveUI.IReactiveObject, ReactiveUI.Validation.Abstractions.IValidatableViewModel { }
+        public static ReactiveUI.Validation.Helpers.ValidationHelper ValidationRule<TViewModel, TViewModelProp>(this TViewModel viewModel, System.Linq.Expressions.Expression<System.Func<TViewModel, TViewModelProp>> viewModelProperty, System.IObservable<bool> viewModelObservable, string message)
+            where TViewModel : ReactiveUI.IReactiveObject, ReactiveUI.Validation.Abstractions.IValidatableViewModel { }
+        public static ReactiveUI.Validation.Helpers.ValidationHelper ValidationRule<TViewModel, TViewModelProp>(this TViewModel viewModel, System.Linq.Expressions.Expression<System.Func<TViewModel, TViewModelProp?>> viewModelProperty, System.Func<TViewModelProp?, bool> isPropertyValid, System.Func<TViewModelProp?, string> message)
+            where TViewModel : ReactiveUI.IReactiveObject, ReactiveUI.Validation.Abstractions.IValidatableViewModel { }
+        public static ReactiveUI.Validation.Helpers.ValidationHelper ValidationRule<TViewModel, TViewModelProp>(this TViewModel viewModel, System.Linq.Expressions.Expression<System.Func<TViewModel, TViewModelProp?>> viewModelProperty, System.Func<TViewModelProp?, bool> isPropertyValid, string message)
+            where TViewModel : ReactiveUI.IReactiveObject, ReactiveUI.Validation.Abstractions.IValidatableViewModel { }
+        public static ReactiveUI.Validation.Helpers.ValidationHelper ValidationRule<TViewModel, TViewModelProp, TValue>(this TViewModel viewModel, System.Linq.Expressions.Expression<System.Func<TViewModel, TViewModelProp>> viewModelProperty, System.IObservable<TValue> validationObservable)
+            where TViewModel : ReactiveUI.IReactiveObject, ReactiveUI.Validation.Abstractions.IValidatableViewModel
+            where TValue : ReactiveUI.Validation.States.IValidationState { }
+        public static ReactiveUI.Validation.Helpers.ValidationHelper ValidationRule<TViewModel, TViewModelProp, TValue>(this TViewModel viewModel, System.Linq.Expressions.Expression<System.Func<TViewModel, TViewModelProp>> viewModelProperty, System.IObservable<TValue> viewModelObservable, System.Func<TValue, bool> isValidFunc, System.Func<TValue, string> messageFunc)
+            where TViewModel : ReactiveUI.IReactiveObject, ReactiveUI.Validation.Abstractions.IValidatableViewModel { }
+    }
+    public static class ValidatesPropertiesExtensions
+    {
+        public static bool ContainsProperty<TViewModel, TProp>(this ReactiveUI.Validation.Components.Abstractions.IValidatesProperties validatesProperties, System.Linq.Expressions.Expression<System.Func<TViewModel, TProp>> propertyExpression, bool exclusively = false) { }
+    }
+    public static class ValidationContextExtensions
+    {
+        public static System.IObservable<System.Collections.Generic.IList<ReactiveUI.Validation.States.IValidationState>> ObserveFor<TViewModel, TViewModelProperty>(this ReactiveUI.Validation.Contexts.IValidationContext context, System.Linq.Expressions.Expression<System.Func<TViewModel, TViewModelProperty>> viewModelProperty, bool strict = true) { }
+    }
+    public static class ViewForExtensions
+    {
+        public static System.IDisposable BindValidation<TView, TViewModel, TViewProperty>(this TView view, TViewModel? viewModel, System.Linq.Expressions.Expression<System.Func<TView, TViewProperty>> viewProperty, ReactiveUI.Validation.Formatters.Abstractions.IValidationTextFormatter<string>? formatter = null)
+            where TView : ReactiveUI.IViewFor<TViewModel>
+            where TViewModel :  class, ReactiveUI.IReactiveObject, ReactiveUI.Validation.Abstractions.IValidatableViewModel { }
+        public static System.IDisposable BindValidation<TView, TViewModel, TViewProperty>(this TView view, TViewModel? viewModel, System.Linq.Expressions.Expression<System.Func<TViewModel?, ReactiveUI.Validation.Helpers.ValidationHelper?>> viewModelHelperProperty, System.Linq.Expressions.Expression<System.Func<TView, TViewProperty>> viewProperty, ReactiveUI.Validation.Formatters.Abstractions.IValidationTextFormatter<string>? formatter = null)
+            where TView : ReactiveUI.IViewFor<TViewModel>
+            where TViewModel :  class, ReactiveUI.IReactiveObject, ReactiveUI.Validation.Abstractions.IValidatableViewModel { }
+        public static System.IDisposable BindValidation<TView, TViewModel, TViewModelProperty, TViewProperty>(this TView view, TViewModel? viewModel, System.Linq.Expressions.Expression<System.Func<TViewModel, TViewModelProperty>> viewModelProperty, System.Linq.Expressions.Expression<System.Func<TView, TViewProperty>> viewProperty, ReactiveUI.Validation.Formatters.Abstractions.IValidationTextFormatter<string>? formatter = null)
+            where TView : ReactiveUI.IViewFor<TViewModel>
+            where TViewModel :  class, ReactiveUI.IReactiveObject, ReactiveUI.Validation.Abstractions.IValidatableViewModel { }
+    }
+}
+namespace ReactiveUI.Validation.Formatters.Abstractions
+{
+    public interface IValidationTextFormatter<out TOut>
+    {
+        TOut Format(ReactiveUI.Validation.Collections.IValidationText validationText);
+    }
+}
+namespace ReactiveUI.Validation.Formatters
+{
+    public class SingleLineFormatter : ReactiveUI.Validation.Formatters.Abstractions.IValidationTextFormatter<string>
+    {
+        public SingleLineFormatter(string? separator = null) { }
+        public static ReactiveUI.Validation.Formatters.SingleLineFormatter Default { get; }
+        public string Format(ReactiveUI.Validation.Collections.IValidationText? validationText) { }
+    }
+}
+namespace ReactiveUI.Validation.Helpers
+{
+    public abstract class ReactiveValidationObject : ReactiveUI.ReactiveObject, ReactiveUI.Validation.Abstractions.IValidatableViewModel, System.ComponentModel.INotifyDataErrorInfo, System.IDisposable
+    {
+        protected ReactiveValidationObject(System.Reactive.Concurrency.IScheduler? scheduler = null, ReactiveUI.Validation.Formatters.Abstractions.IValidationTextFormatter<string>? formatter = null) { }
+        public bool HasErrors { get; }
+        public ReactiveUI.Validation.Contexts.IValidationContext ValidationContext { get; }
+        public event System.EventHandler<System.ComponentModel.DataErrorsChangedEventArgs>? ErrorsChanged;
+        public void Dispose() { }
+        protected virtual void Dispose(bool disposing) { }
+        public virtual System.Collections.IEnumerable GetErrors(string? propertyName) { }
+        protected void RaiseErrorsChanged(string propertyName = "") { }
+    }
+    public class ValidationHelper : ReactiveUI.ReactiveObject, System.IDisposable
+    {
+        public ValidationHelper(ReactiveUI.Validation.Components.Abstractions.IValidationComponent validation, System.IDisposable? cleanup = null) { }
+        public bool IsValid { get; }
+        public ReactiveUI.Validation.Collections.IValidationText Message { get; }
+        public System.IObservable<ReactiveUI.Validation.States.IValidationState> ValidationChanged { get; }
+        public void Dispose() { }
+        protected virtual void Dispose(bool disposing) { }
+    }
+}
+namespace ReactiveUI.Validation.States
+{
+    public interface IValidationState
+    {
+        bool IsValid { get; }
+        ReactiveUI.Validation.Collections.IValidationText Text { get; }
+    }
+    public class ValidationState : ReactiveUI.Validation.States.IValidationState
+    {
+        public static readonly ReactiveUI.Validation.States.IValidationState Valid;
+        public ValidationState(bool isValid, ReactiveUI.Validation.Collections.IValidationText text) { }
+        public ValidationState(bool isValid, string text) { }
+        public bool IsValid { get; }
+        public ReactiveUI.Validation.Collections.IValidationText Text { get; }
+    }
+}
+namespace ReactiveUI.Validation.ValidationBindings.Abstractions
+{
+    public interface IValidationBinding : System.IDisposable { }
+}
+namespace ReactiveUI.Validation.ValidationBindings
+{
+    public sealed class ValidationBinding : ReactiveUI.Validation.ValidationBindings.Abstractions.IValidationBinding, System.IDisposable
+    {
+        public void Dispose() { }
+        public static ReactiveUI.Validation.ValidationBindings.Abstractions.IValidationBinding ForProperty<TView, TViewModel, TViewModelProperty, TOut>(TView view, System.Linq.Expressions.Expression<System.Func<TViewModel, TViewModelProperty>> viewModelProperty, System.Action<System.Collections.Generic.IList<ReactiveUI.Validation.States.IValidationState>, System.Collections.Generic.IList<TOut>> action, ReactiveUI.Validation.Formatters.Abstractions.IValidationTextFormatter<TOut> formatter, bool strict = true)
+            where TView : ReactiveUI.IViewFor<TViewModel>
+            where TViewModel :  class, ReactiveUI.IReactiveObject, ReactiveUI.Validation.Abstractions.IValidatableViewModel { }
+        public static ReactiveUI.Validation.ValidationBindings.Abstractions.IValidationBinding ForProperty<TView, TViewModel, TViewModelProperty, TViewProperty>(TView view, System.Linq.Expressions.Expression<System.Func<TViewModel, TViewModelProperty>> viewModelProperty, System.Linq.Expressions.Expression<System.Func<TView, TViewProperty>> viewProperty, ReactiveUI.Validation.Formatters.Abstractions.IValidationTextFormatter<string>? formatter = null, bool strict = true)
+            where TView : ReactiveUI.IViewFor<TViewModel>
+            where TViewModel :  class, ReactiveUI.IReactiveObject, ReactiveUI.Validation.Abstractions.IValidatableViewModel { }
+        public static ReactiveUI.Validation.ValidationBindings.Abstractions.IValidationBinding ForValidationHelperProperty<TView, TViewModel, TOut>(TView view, System.Linq.Expressions.Expression<System.Func<TViewModel?, ReactiveUI.Validation.Helpers.ValidationHelper?>> viewModelHelperProperty, System.Action<ReactiveUI.Validation.States.IValidationState, TOut> action, ReactiveUI.Validation.Formatters.Abstractions.IValidationTextFormatter<TOut> formatter)
+            where TView : ReactiveUI.IViewFor<TViewModel>
+            where TViewModel :  class, ReactiveUI.IReactiveObject, ReactiveUI.Validation.Abstractions.IValidatableViewModel { }
+        public static ReactiveUI.Validation.ValidationBindings.Abstractions.IValidationBinding ForValidationHelperProperty<TView, TViewModel, TViewProperty>(TView view, System.Linq.Expressions.Expression<System.Func<TViewModel?, ReactiveUI.Validation.Helpers.ValidationHelper?>> viewModelHelperProperty, System.Linq.Expressions.Expression<System.Func<TView, TViewProperty>> viewProperty, ReactiveUI.Validation.Formatters.Abstractions.IValidationTextFormatter<string>? formatter = null)
+            where TView : ReactiveUI.IViewFor<TViewModel>
+            where TViewModel :  class, ReactiveUI.IReactiveObject, ReactiveUI.Validation.Abstractions.IValidatableViewModel { }
+        public static ReactiveUI.Validation.ValidationBindings.Abstractions.IValidationBinding ForViewModel<TView, TViewModel, TOut>(TView view, System.Action<TOut> action, ReactiveUI.Validation.Formatters.Abstractions.IValidationTextFormatter<TOut> formatter)
+            where TView : ReactiveUI.IViewFor<TViewModel>
+            where TViewModel :  class, ReactiveUI.IReactiveObject, ReactiveUI.Validation.Abstractions.IValidatableViewModel { }
+        public static ReactiveUI.Validation.ValidationBindings.Abstractions.IValidationBinding ForViewModel<TView, TViewModel, TViewProperty>(TView view, System.Linq.Expressions.Expression<System.Func<TView, TViewProperty>> viewProperty, ReactiveUI.Validation.Formatters.Abstractions.IValidationTextFormatter<string>? formatter = null)
+            where TView : ReactiveUI.IViewFor<TViewModel>
+            where TViewModel :  class, ReactiveUI.IReactiveObject, ReactiveUI.Validation.Abstractions.IValidatableViewModel { }
+    }
+}
\ No newline at end of file
diff --git a/src/ReactiveUI.Validation.Tests/ReactiveUI.Validation.Tests.csproj b/src/ReactiveUI.Validation.Tests/ReactiveUI.Validation.Tests.csproj
index edf72726..b3f2fa81 100644
--- a/src/ReactiveUI.Validation.Tests/ReactiveUI.Validation.Tests.csproj
+++ b/src/ReactiveUI.Validation.Tests/ReactiveUI.Validation.Tests.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFrameworks>net6.0;net8.0</TargetFrameworks>
+    <TargetFrameworks>net8.0;net9.0</TargetFrameworks>
     <NoWarn>$(NoWarn);1591;CA1707;SA1633</NoWarn>
   </PropertyGroup>
 
@@ -10,13 +10,13 @@
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.13.0" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.14.1" />
     <PackageReference Include="xunit" Version="2.9.3" />
     <PackageReference Include="xunit.runner.console" Version="2.9.3" />
     <PackageReference Include="Xunit.StaFact" Version="1.2.69" />
-    <PackageReference Include="Microsoft.Reactive.Testing" Version="6.0.1" />
+    <PackageReference Include="Microsoft.Reactive.Testing" Version="6.0.2" />
     <PackageReference Include="PublicApiGenerator" Version="11.4.6" />
-    <PackageReference Include="Verify.Xunit" Version="30.7.3" />
+    <PackageReference Include="Verify.Xunit" Version="30.10.0" />
     <PackageReference Include="xunit.runner.visualstudio" Version="3.1.4" />
     <PackageReference Include="coverlet.msbuild" Version="6.0.4">
       <PrivateAssets>all</PrivateAssets>
diff --git a/src/ReactiveUI.Validation.sln b/src/ReactiveUI.Validation.sln
index 936a87b4..c5f76378 100644
--- a/src/ReactiveUI.Validation.sln
+++ b/src/ReactiveUI.Validation.sln
@@ -1,6 +1,6 @@
 
 Microsoft Visual Studio Solution File, Format Version 12.00
-# 17
+# Visual Studio Version 17
 VisualStudioVersion = 17.9.34728.123
 MinimumVisualStudioVersion = 10.0.40219.1
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "ReactiveUI.Validation", "ReactiveUI.Validation\ReactiveUI.Validation.csproj", "{B62AABD0-22A4-470D-B6EB-F6B3EAE668DE}"
@@ -14,6 +14,7 @@ Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Solution Items", "Solution
 		Directory.build.props = Directory.build.props
 		Directory.build.targets = Directory.build.targets
 		global.json = global.json
+		..\README.md = ..\README.md
 		stylecop.json = stylecop.json
 		..\version.json = ..\version.json
 	EndProjectSection
diff --git a/src/ReactiveUI.Validation/Abstractions/IValidatableViewModel.cs b/src/ReactiveUI.Validation/Abstractions/IValidatableViewModel.cs
index 54178511..a40d5e06 100755
--- a/src/ReactiveUI.Validation/Abstractions/IValidatableViewModel.cs
+++ b/src/ReactiveUI.Validation/Abstractions/IValidatableViewModel.cs
@@ -1,4 +1,4 @@
-// Copyright (c) 2024 .NET Foundation and Contributors. All rights reserved.
+// Copyright (c) 2025 .NET Foundation and Contributors. All rights reserved.
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for full license information.
diff --git a/src/ReactiveUI.Validation/Collections/ArrayValidationText.cs b/src/ReactiveUI.Validation/Collections/ArrayValidationText.cs
index 6b1db7a9..ae8db21c 100644
--- a/src/ReactiveUI.Validation/Collections/ArrayValidationText.cs
+++ b/src/ReactiveUI.Validation/Collections/ArrayValidationText.cs
@@ -1,4 +1,4 @@
-// Copyright (c) 2024 .NET Foundation and Contributors. All rights reserved.
+// Copyright (c) 2025 .NET Foundation and Contributors. All rights reserved.
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for full license information.
diff --git a/src/ReactiveUI.Validation/Collections/IValidationText.cs b/src/ReactiveUI.Validation/Collections/IValidationText.cs
index 7f33a015..d6641112 100644
--- a/src/ReactiveUI.Validation/Collections/IValidationText.cs
+++ b/src/ReactiveUI.Validation/Collections/IValidationText.cs
@@ -1,4 +1,4 @@
-// Copyright (c) 2024 .NET Foundation and Contributors. All rights reserved.
+// Copyright (c) 2025 .NET Foundation and Contributors. All rights reserved.
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for full license information.
diff --git a/src/ReactiveUI.Validation/Collections/ReadOnlyDisposableCollection{T}.cs b/src/ReactiveUI.Validation/Collections/ReadOnlyDisposableCollection{T}.cs
index 1a532a12..4530dcec 100644
--- a/src/ReactiveUI.Validation/Collections/ReadOnlyDisposableCollection{T}.cs
+++ b/src/ReactiveUI.Validation/Collections/ReadOnlyDisposableCollection{T}.cs
@@ -1,4 +1,4 @@
-// Copyright (c) 2024 .NET Foundation and Contributors. All rights reserved.
+// Copyright (c) 2025 .NET Foundation and Contributors. All rights reserved.
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for full license information.
diff --git a/src/ReactiveUI.Validation/Collections/SingleValidationText.cs b/src/ReactiveUI.Validation/Collections/SingleValidationText.cs
index 7d19655a..a3d2ca3d 100644
--- a/src/ReactiveUI.Validation/Collections/SingleValidationText.cs
+++ b/src/ReactiveUI.Validation/Collections/SingleValidationText.cs
@@ -1,4 +1,4 @@
-// Copyright (c) 2024 .NET Foundation and Contributors. All rights reserved.
+// Copyright (c) 2025 .NET Foundation and Contributors. All rights reserved.
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for full license information.
diff --git a/src/ReactiveUI.Validation/Collections/ValidationText.cs b/src/ReactiveUI.Validation/Collections/ValidationText.cs
index 0c26bbfa..9c288bde 100755
--- a/src/ReactiveUI.Validation/Collections/ValidationText.cs
+++ b/src/ReactiveUI.Validation/Collections/ValidationText.cs
@@ -1,4 +1,4 @@
-// Copyright (c) 2024 .NET Foundation and Contributors. All rights reserved.
+// Copyright (c) 2025 .NET Foundation and Contributors. All rights reserved.
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for full license information.
diff --git a/src/ReactiveUI.Validation/Comparators/ValidationStateComparer.cs b/src/ReactiveUI.Validation/Comparators/ValidationStateComparer.cs
index f1374a10..4bf6b36c 100755
--- a/src/ReactiveUI.Validation/Comparators/ValidationStateComparer.cs
+++ b/src/ReactiveUI.Validation/Comparators/ValidationStateComparer.cs
@@ -1,4 +1,4 @@
-// Copyright (c) 2024 .NET Foundation and Contributors. All rights reserved.
+// Copyright (c) 2025 .NET Foundation and Contributors. All rights reserved.
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for full license information.
diff --git a/src/ReactiveUI.Validation/Components/Abstractions/IPropertyValidationComponent.cs b/src/ReactiveUI.Validation/Components/Abstractions/IPropertyValidationComponent.cs
index 12dcbf88..e57ef325 100644
--- a/src/ReactiveUI.Validation/Components/Abstractions/IPropertyValidationComponent.cs
+++ b/src/ReactiveUI.Validation/Components/Abstractions/IPropertyValidationComponent.cs
@@ -1,4 +1,4 @@
-// Copyright (c) 2024 .NET Foundation and Contributors. All rights reserved.
+// Copyright (c) 2025 .NET Foundation and Contributors. All rights reserved.
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for full license information.
diff --git a/src/ReactiveUI.Validation/Components/Abstractions/IValidatesProperties.cs b/src/ReactiveUI.Validation/Components/Abstractions/IValidatesProperties.cs
index 7cadabe8..286d7e10 100644
--- a/src/ReactiveUI.Validation/Components/Abstractions/IValidatesProperties.cs
+++ b/src/ReactiveUI.Validation/Components/Abstractions/IValidatesProperties.cs
@@ -1,4 +1,4 @@
-// Copyright (c) 2024 .NET Foundation and Contributors. All rights reserved.
+// Copyright (c) 2025 .NET Foundation and Contributors. All rights reserved.
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for full license information.
diff --git a/src/ReactiveUI.Validation/Components/Abstractions/IValidationComponent.cs b/src/ReactiveUI.Validation/Components/Abstractions/IValidationComponent.cs
index 9ade5615..9747dd65 100755
--- a/src/ReactiveUI.Validation/Components/Abstractions/IValidationComponent.cs
+++ b/src/ReactiveUI.Validation/Components/Abstractions/IValidationComponent.cs
@@ -1,4 +1,4 @@
-// Copyright (c) 2024 .NET Foundation and Contributors. All rights reserved.
+// Copyright (c) 2025 .NET Foundation and Contributors. All rights reserved.
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for full license information.
diff --git a/src/ReactiveUI.Validation/Components/BasePropertyValidation.cs b/src/ReactiveUI.Validation/Components/BasePropertyValidation.cs
index 3d0edc59..5f8d990c 100755
--- a/src/ReactiveUI.Validation/Components/BasePropertyValidation.cs
+++ b/src/ReactiveUI.Validation/Components/BasePropertyValidation.cs
@@ -1,4 +1,4 @@
-// Copyright (c) 2024 .NET Foundation and Contributors. All rights reserved.
+// Copyright (c) 2025 .NET Foundation and Contributors. All rights reserved.
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for full license information.
diff --git a/src/ReactiveUI.Validation/Components/ObservableValidationBase{TViewModel,TValue}.cs b/src/ReactiveUI.Validation/Components/ObservableValidationBase{TViewModel,TValue}.cs
index 3da5c887..6c07713c 100644
--- a/src/ReactiveUI.Validation/Components/ObservableValidationBase{TViewModel,TValue}.cs
+++ b/src/ReactiveUI.Validation/Components/ObservableValidationBase{TViewModel,TValue}.cs
@@ -1,4 +1,4 @@
-// Copyright (c) 2024 .NET Foundation and Contributors. All rights reserved.
+// Copyright (c) 2025 .NET Foundation and Contributors. All rights reserved.
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for full license information.
diff --git a/src/ReactiveUI.Validation/Components/ObservableValidation{TViewModel,TValue,TProp}.cs b/src/ReactiveUI.Validation/Components/ObservableValidation{TViewModel,TValue,TProp}.cs
index 20800907..ed6c01b7 100644
--- a/src/ReactiveUI.Validation/Components/ObservableValidation{TViewModel,TValue,TProp}.cs
+++ b/src/ReactiveUI.Validation/Components/ObservableValidation{TViewModel,TValue,TProp}.cs
@@ -1,4 +1,4 @@
-// Copyright (c) 2024 .NET Foundation and Contributors. All rights reserved.
+// Copyright (c) 2025 .NET Foundation and Contributors. All rights reserved.
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for full license information.
diff --git a/src/ReactiveUI.Validation/Components/ObservableValidation{TViewModel,TValue}.cs b/src/ReactiveUI.Validation/Components/ObservableValidation{TViewModel,TValue}.cs
index 91151add..a5f70555 100644
--- a/src/ReactiveUI.Validation/Components/ObservableValidation{TViewModel,TValue}.cs
+++ b/src/ReactiveUI.Validation/Components/ObservableValidation{TViewModel,TValue}.cs
@@ -1,4 +1,4 @@
-// Copyright (c) 2024 .NET Foundation and Contributors. All rights reserved.
+// Copyright (c) 2025 .NET Foundation and Contributors. All rights reserved.
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for full license information.
diff --git a/src/ReactiveUI.Validation/Contexts/IValidationContext.cs b/src/ReactiveUI.Validation/Contexts/IValidationContext.cs
index 8fd1efc6..740d5c6d 100644
--- a/src/ReactiveUI.Validation/Contexts/IValidationContext.cs
+++ b/src/ReactiveUI.Validation/Contexts/IValidationContext.cs
@@ -1,4 +1,4 @@
-// Copyright (c) 2024 .NET Foundation and Contributors. All rights reserved.
+// Copyright (c) 2025 .NET Foundation and Contributors. All rights reserved.
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for full license information.
diff --git a/src/ReactiveUI.Validation/Contexts/ValidationContext.cs b/src/ReactiveUI.Validation/Contexts/ValidationContext.cs
index ed2f8820..effeefd8 100755
--- a/src/ReactiveUI.Validation/Contexts/ValidationContext.cs
+++ b/src/ReactiveUI.Validation/Contexts/ValidationContext.cs
@@ -1,4 +1,4 @@
-// Copyright (c) 2024 .NET Foundation and Contributors. All rights reserved.
+// Copyright (c) 2025 .NET Foundation and Contributors. All rights reserved.
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for full license information.
diff --git a/src/ReactiveUI.Validation/Extensions/ArrayPoolExtensions.cs b/src/ReactiveUI.Validation/Extensions/ArrayPoolExtensions.cs
index 5c6c3553..4f3e2b9b 100644
--- a/src/ReactiveUI.Validation/Extensions/ArrayPoolExtensions.cs
+++ b/src/ReactiveUI.Validation/Extensions/ArrayPoolExtensions.cs
@@ -1,4 +1,4 @@
-// Copyright (c) 2024 .NET Foundation and Contributors. All rights reserved.
+// Copyright (c) 2025 .NET Foundation and Contributors. All rights reserved.
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for full license information.
diff --git a/src/ReactiveUI.Validation/Extensions/ExpressionExtensions.cs b/src/ReactiveUI.Validation/Extensions/ExpressionExtensions.cs
index 669f4977..e39cdfa0 100644
--- a/src/ReactiveUI.Validation/Extensions/ExpressionExtensions.cs
+++ b/src/ReactiveUI.Validation/Extensions/ExpressionExtensions.cs
@@ -1,4 +1,4 @@
-// Copyright (c) 2024 .NET Foundation and Contributors. All rights reserved.
+// Copyright (c) 2025 .NET Foundation and Contributors. All rights reserved.
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for full license information.
diff --git a/src/ReactiveUI.Validation/Extensions/ValidatableViewModelExtensions.cs b/src/ReactiveUI.Validation/Extensions/ValidatableViewModelExtensions.cs
index 086741df..a6005d75 100644
--- a/src/ReactiveUI.Validation/Extensions/ValidatableViewModelExtensions.cs
+++ b/src/ReactiveUI.Validation/Extensions/ValidatableViewModelExtensions.cs
@@ -1,4 +1,4 @@
-// Copyright (c) 2024 .NET Foundation and Contributors. All rights reserved.
+// Copyright (c) 2025 .NET Foundation and Contributors. All rights reserved.
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for full license information.
diff --git a/src/ReactiveUI.Validation/Extensions/ValidatesPropertiesExtensions.cs b/src/ReactiveUI.Validation/Extensions/ValidatesPropertiesExtensions.cs
index 0e6cf6f5..c3f5bc81 100644
--- a/src/ReactiveUI.Validation/Extensions/ValidatesPropertiesExtensions.cs
+++ b/src/ReactiveUI.Validation/Extensions/ValidatesPropertiesExtensions.cs
@@ -1,4 +1,4 @@
-// Copyright (c) 2024 .NET Foundation and Contributors. All rights reserved.
+// Copyright (c) 2025 .NET Foundation and Contributors. All rights reserved.
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for full license information.
diff --git a/src/ReactiveUI.Validation/Extensions/ValidationContextExtensions.cs b/src/ReactiveUI.Validation/Extensions/ValidationContextExtensions.cs
index 46d3c813..ce768b64 100755
--- a/src/ReactiveUI.Validation/Extensions/ValidationContextExtensions.cs
+++ b/src/ReactiveUI.Validation/Extensions/ValidationContextExtensions.cs
@@ -1,4 +1,4 @@
-// Copyright (c) 2024 .NET Foundation and Contributors. All rights reserved.
+// Copyright (c) 2025 .NET Foundation and Contributors. All rights reserved.
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for full license information.
diff --git a/src/ReactiveUI.Validation/Extensions/ViewForExtensions.cs b/src/ReactiveUI.Validation/Extensions/ViewForExtensions.cs
index 4874ad02..de16b085 100755
--- a/src/ReactiveUI.Validation/Extensions/ViewForExtensions.cs
+++ b/src/ReactiveUI.Validation/Extensions/ViewForExtensions.cs
@@ -1,4 +1,4 @@
-// Copyright (c) 2024 .NET Foundation and Contributors. All rights reserved.
+// Copyright (c) 2025 .NET Foundation and Contributors. All rights reserved.
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for full license information.
diff --git a/src/ReactiveUI.Validation/Formatters/Abstractions/IValidationTextFormatter.cs b/src/ReactiveUI.Validation/Formatters/Abstractions/IValidationTextFormatter.cs
index 37e00fdb..2b6c4cf0 100755
--- a/src/ReactiveUI.Validation/Formatters/Abstractions/IValidationTextFormatter.cs
+++ b/src/ReactiveUI.Validation/Formatters/Abstractions/IValidationTextFormatter.cs
@@ -1,4 +1,4 @@
-// Copyright (c) 2024 .NET Foundation and Contributors. All rights reserved.
+// Copyright (c) 2025 .NET Foundation and Contributors. All rights reserved.
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for full license information.
diff --git a/src/ReactiveUI.Validation/Formatters/SingleLineFormatter.cs b/src/ReactiveUI.Validation/Formatters/SingleLineFormatter.cs
index 67660078..7521ae5c 100755
--- a/src/ReactiveUI.Validation/Formatters/SingleLineFormatter.cs
+++ b/src/ReactiveUI.Validation/Formatters/SingleLineFormatter.cs
@@ -1,4 +1,4 @@
-// Copyright (c) 2024 .NET Foundation and Contributors. All rights reserved.
+// Copyright (c) 2025 .NET Foundation and Contributors. All rights reserved.
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for full license information.
diff --git a/src/ReactiveUI.Validation/Helpers/ReactiveValidationObject.cs b/src/ReactiveUI.Validation/Helpers/ReactiveValidationObject.cs
index a40be4d0..06450361 100644
--- a/src/ReactiveUI.Validation/Helpers/ReactiveValidationObject.cs
+++ b/src/ReactiveUI.Validation/Helpers/ReactiveValidationObject.cs
@@ -1,4 +1,4 @@
-// Copyright (c) 2024 .NET Foundation and Contributors. All rights reserved.
+// Copyright (c) 2025 .NET Foundation and Contributors. All rights reserved.
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for full license information.
diff --git a/src/ReactiveUI.Validation/Helpers/ValidationHelper.cs b/src/ReactiveUI.Validation/Helpers/ValidationHelper.cs
index 947cd610..be6055d7 100755
--- a/src/ReactiveUI.Validation/Helpers/ValidationHelper.cs
+++ b/src/ReactiveUI.Validation/Helpers/ValidationHelper.cs
@@ -1,4 +1,4 @@
-// Copyright (c) 2024 .NET Foundation and Contributors. All rights reserved.
+// Copyright (c) 2025 .NET Foundation and Contributors. All rights reserved.
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for full license information.
diff --git a/src/ReactiveUI.Validation/ReactiveUI.Validation.csproj b/src/ReactiveUI.Validation/ReactiveUI.Validation.csproj
index 9d4c9c0f..a75c1396 100644
--- a/src/ReactiveUI.Validation/ReactiveUI.Validation.csproj
+++ b/src/ReactiveUI.Validation/ReactiveUI.Validation.csproj
@@ -1,14 +1,14 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFrameworks>netstandard2.0;net6.0;net8.0;net8.0-android;net8.0-ios;net8.0-tvos;net8.0-macos;net8.0-maccatalyst</TargetFrameworks>
-    <TargetFrameworks Condition=" '$(OS)' == 'Windows_NT' ">$(TargetFrameworks);net462;net472;net6.0-windows10.0.17763.0;net8.0-windows10.0.17763.0</TargetFrameworks>
+    <TargetFrameworks>netstandard2.0;net8.0;net8.0-android;net8.0-ios;net8.0-tvos;net8.0-macos;net8.0-maccatalyst;net9.0;net9.0-android;net9.0-ios;net9.0-tvos;net9.0-macos;net9.0-maccatalyst</TargetFrameworks>
+    <TargetFrameworks Condition=" '$(OS)' == 'Windows_NT' ">$(TargetFrameworks);net462;net472;net8.0-windows10.0.17763.0;net9.0-windows10.0.17763.0</TargetFrameworks>
     <NoWarn>$(NoWarn);CS1591</NoWarn>
     <Nullable>enable</Nullable>
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="ReactiveUI" Version="20.4.1" />    
+    <PackageReference Include="ReactiveUI" Version="21.0.1" />    
   </ItemGroup>
 
   <ItemGroup Condition="$(TargetFramework.StartsWith('netstandard')) or $(TargetFramework.StartsWith('net4'))">
diff --git a/src/ReactiveUI.Validation/States/IValidationState.cs b/src/ReactiveUI.Validation/States/IValidationState.cs
index 7359581a..998ea331 100644
--- a/src/ReactiveUI.Validation/States/IValidationState.cs
+++ b/src/ReactiveUI.Validation/States/IValidationState.cs
@@ -1,4 +1,4 @@
-// Copyright (c) 2024 .NET Foundation and Contributors. All rights reserved.
+// Copyright (c) 2025 .NET Foundation and Contributors. All rights reserved.
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for full license information.
diff --git a/src/ReactiveUI.Validation/States/ValidationState.cs b/src/ReactiveUI.Validation/States/ValidationState.cs
index 88a47317..446f7d43 100755
--- a/src/ReactiveUI.Validation/States/ValidationState.cs
+++ b/src/ReactiveUI.Validation/States/ValidationState.cs
@@ -1,4 +1,4 @@
-// Copyright (c) 2024 .NET Foundation and Contributors. All rights reserved.
+// Copyright (c) 2025 .NET Foundation and Contributors. All rights reserved.
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for full license information.
diff --git a/src/ReactiveUI.Validation/ValidationBindings/Abstractions/IValidationBinding.cs b/src/ReactiveUI.Validation/ValidationBindings/Abstractions/IValidationBinding.cs
index 1bb6b5d2..08035e1d 100755
--- a/src/ReactiveUI.Validation/ValidationBindings/Abstractions/IValidationBinding.cs
+++ b/src/ReactiveUI.Validation/ValidationBindings/Abstractions/IValidationBinding.cs
@@ -1,4 +1,4 @@
-// Copyright (c) 2024 .NET Foundation and Contributors. All rights reserved.
+// Copyright (c) 2025 .NET Foundation and Contributors. All rights reserved.
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for full license information.
diff --git a/src/ReactiveUI.Validation/ValidationBindings/ValidationBinding.cs b/src/ReactiveUI.Validation/ValidationBindings/ValidationBinding.cs
index 587141ac..6e408f4c 100755
--- a/src/ReactiveUI.Validation/ValidationBindings/ValidationBinding.cs
+++ b/src/ReactiveUI.Validation/ValidationBindings/ValidationBinding.cs
@@ -1,4 +1,4 @@
-// Copyright (c) 2024 .NET Foundation and Contributors. All rights reserved.
+// Copyright (c) 2025 .NET Foundation and Contributors. All rights reserved.
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for full license information.
diff --git a/src/stylecop.json b/src/stylecop.json
index d312166b..4d017362 100644
--- a/src/stylecop.json
+++ b/src/stylecop.json
@@ -13,7 +13,7 @@
             "documentPrivateFields": false,
             "documentationCulture": "en-US",
             "companyName": ".NET Foundation and Contributors",
-            "copyrightText": "Copyright (c) 2024 {companyName}. All rights reserved.\nLicensed to the .NET Foundation under one or more agreements.\nThe .NET Foundation licenses this file to you under the {licenseName} license.\nSee the {licenseFile} file in the project root for full license information.",
+            "copyrightText": "Copyright (c) 2025 {companyName}. All rights reserved.\nLicensed to the .NET Foundation under one or more agreements.\nThe .NET Foundation licenses this file to you under the {licenseName} license.\nSee the {licenseFile} file in the project root for full license information.",
             "variables": {
                 "licenseName": "MIT",
                 "licenseFile": "LICENSE"
diff --git a/version.json b/version.json
index 021207b4..7532ada5 100644
--- a/version.json
+++ b/version.json
@@ -1,5 +1,5 @@
 {
-    "version": "4.1",
+    "version": "5.0",
     "publicReleaseRefSpec": [
         "^refs/heads/main$",
         "^refs/heads/latest$",