Add docs for MVVMTK0036

docs/mvvm/generators/errors/MVVMTK0035.md

@@ -9,7 +9,7 @@ dev_langs:
 
 # MVVM Toolkit error MVVMTK0035
 
-All attributes targeting the generated property for a field annotated with [ObservableProperty] must correctly be resolved to valid types. This error is shown when a given `property:` attribute over a field with `[ObservableProperty]` is not correctly resolved to a type, which helps identifying issues at compile time as soon as possible. A common example where this can happen is if a `using` directive for the attribute is missing.
+All attributes targeting the generated property for a field annotated with `[ObservableProperty]` must correctly be resolved to valid types. This error is shown when a given `property:` attribute over a field with `[ObservableProperty]` is not correctly resolved to a type, which helps identifying issues at compile time as soon as possible. A common example where this can happen is if a `using` directive for the attribute is missing.
 
 The following sample generates MVVMTK0035:
 

docs/mvvm/generators/errors/MVVMTK0036.md

@@ -0,0 +1,61 @@
+---
+title: MVVM Toolkit error MVVMTK0036
+author: Sergio0694
+description: MVVM Toolkit error MVVMTK0036
+keywords: community toolkit, dotnet, csharp, mvvm, net core, net standard, source generators
+dev_langs:
+  - csharp
+---
+
+# MVVM Toolkit error MVVMTK0036
+
+All attributes targeting the generated field or property for a method annotated with `[RelayCommand]` must correctly be resolved to valid types. This error is shown when a given `field:` or `property:` attribute over a method with `[RelayCommand]` is not correctly resolved to a type, which helps identifying issues at compile time as soon as possible. A common example where this can happen is if a `using` directive for the attribute is missing.
+
+The following sample generates MVVMTK0036:
+
+```csharp
+using CommunityToolkit.Mvvm.ComponentModel;
+using CommunityToolkit.Mvvm.Input;
+
+namespace MyApp;
+
+public partial class SampleViewModel : ObservableObject
+{
+    [ObservableProperty]
+    private int counter;
+
+    [RelayCommand]
+    [property: JsonIgnore]
+    private void IncrementCounter()
+    {
+        Counter++;
+    }
+}
+```
+
+You can see that `JsonIgnore` has no `using` directive here, and as such is not resolved correctly. You can fix this by updating the code as follows:
+
+```csharp
+using System.Text.Json.Serialization;
+using CommunityToolkit.Mvvm.ComponentModel;
+using CommunityToolkit.Mvvm.Input;
+
+namespace MyApp;
+
+public partial class SampleViewModel : ObservableObject
+{
+    [ObservableProperty]
+    private int counter;
+
+    [RelayCommand]
+    [property: JsonIgnore]
+    private void IncrementCounter()
+    {
+        Counter++;
+    }
+}
+```
+
+## Additional resources
+
+- You can find more examples in the [unit tests](https://github.com/CommunityToolkit/dotnet/tree/main/tests/CommunityToolkit.Mvvm.SourceGenerators.UnitTests).

docs/mvvm/generators/errors/TOC.yml

@@ -69,3 +69,5 @@ items:
   href: MVVMTK0034.md
 - name: MVVMTK0035
   href: MVVMTK0035.md
+- name: MVVMTK0036
+  href: MVVMTK0036.md