diff --git a/PolyShim.Tests/Net50/EnvironmentTests.cs b/PolyShim.Tests/Net50/EnvironmentTests.cs
new file mode 100644
index 0000000..b8a659e
--- /dev/null
+++ b/PolyShim.Tests/Net50/EnvironmentTests.cs
@@ -0,0 +1,19 @@
+using System;
+using System.Diagnostics;
+using FluentAssertions;
+using Xunit;
+
+namespace PolyShim.Tests.Net50;
+
+public class EnvironmentTests
+{
+    [Fact]
+    public void ProcessId_Test()
+    {
+        // Arrange
+        using var process = Process.GetCurrentProcess();
+
+        // Act & assert
+        Environment.ProcessId.Should().Be(process.Id);
+    }
+}
diff --git a/PolyShim.Tests/Net60/EnvironmentTests.cs b/PolyShim.Tests/Net60/EnvironmentTests.cs
new file mode 100644
index 0000000..46bd194
--- /dev/null
+++ b/PolyShim.Tests/Net60/EnvironmentTests.cs
@@ -0,0 +1,19 @@
+using System;
+using System.Diagnostics;
+using FluentAssertions;
+using Xunit;
+
+namespace PolyShim.Tests.Net60;
+
+public class EnvironmentTests
+{
+    [Fact]
+    public void ProcessPath_Test()
+    {
+        // Arrange
+        using var process = Process.GetCurrentProcess();
+
+        // Act & assert
+        Environment.ProcessPath.Should().Be(process.MainModule?.FileName);
+    }
+}
diff --git a/PolyShim/Net50/Environment.cs b/PolyShim/Net50/Environment.cs
new file mode 100644
index 0000000..9942d5d
--- /dev/null
+++ b/PolyShim/Net50/Environment.cs
@@ -0,0 +1,32 @@
+// The following comment is required to instruct analyzers to skip this file
+// <auto-generated/>
+
+#if (NETCOREAPP && !NET5_0_OR_GREATER) || (NETFRAMEWORK) || (NETSTANDARD)
+#nullable enable
+// ReSharper disable RedundantUsingDirective
+// ReSharper disable CheckNamespace
+// ReSharper disable InconsistentNaming
+// ReSharper disable PartialTypeWithSinglePart
+
+using System;
+using System.Diagnostics;
+
+internal static partial class PolyfillExtensions
+{
+    extension(Environment)
+    {
+// No Process class in .NET Standard 1.x
+#if !NETSTANDARD || NETSTANDARD2_0_OR_GREATER
+        // https://learn.microsoft.com/dotnet/api/system.environment.processid
+        public static int ProcessId
+        {
+            get
+            {
+                using var process = Process.GetCurrentProcess();
+                return process.Id;
+            }
+        }
+#endif
+    }
+}
+#endif
\ No newline at end of file