Fix crash when converting properties to methods

src/Features/CSharpTest/ReplaceMethodWithProperty/ReplaceMethodWithPropertyTests.cs

@@ -15,7 +15,7 @@
 namespace Microsoft.CodeAnalysis.Editor.CSharp.UnitTests.CodeActions.ReplaceMethodWithProperty;
 
 [Trait(Traits.Feature, Traits.Features.CodeActionsReplaceMethodWithProperty)]
-public class ReplaceMethodWithPropertyTests : AbstractCSharpCodeActionTest_NoEditor
+public sealed class ReplaceMethodWithPropertyTests : AbstractCSharpCodeActionTest_NoEditor
 {
     protected override CodeRefactoringProvider CreateCodeRefactoringProvider(TestWorkspace workspace, TestParameters parameters)
         => new ReplaceMethodWithPropertyCodeRefactoringProvider();

src/Features/CSharpTest/ReplacePropertyWithMethods/ReplacePropertyWithMethodsTests.cs

@@ -15,7 +15,7 @@
 namespace Microsoft.CodeAnalysis.Editor.CSharp.UnitTests.CodeActions.ReplacePropertyWithMethods;
 
 [Trait(Traits.Feature, Traits.Features.CodeActionsReplacePropertyWithMethods)]
-public class ReplacePropertyWithMethodsTests : AbstractCSharpCodeActionTest_NoEditor
+public sealed class ReplacePropertyWithMethodsTests : AbstractCSharpCodeActionTest_NoEditor
 {
     private OptionsCollection PreferExpressionBodiedMethods
         => new(GetLanguage()) { { CSharpCodeStyleOptions.PreferExpressionBodiedMethods, CSharpCodeStyleOptions.WhenPossibleWithSuggestionEnforcement } };
@@ -2490,4 +2490,29 @@ private static void SetSomeValue(int value)
             }
             """);
     }
+
+    [Fact, WorkItem("https://github.com/dotnet/roslyn/issues/75135")]
+    public async Task TestMatchInPropertyPattern()
+    {
+        await TestInRegularAndScriptAsync("""
+            class C
+            {
+                public int [||]Property { get { return 0; } }
+                public bool M()
+                {
+                    return this is { Property: 1 };
+                }
+            }
+            """, """
+            class C
+            {
+                public int GetProperty()
+                { return 0; }
+                public bool M()
+                {
+                    return this is { {|Conflict:Property|}: 1 };
+                }
+            }
+            """);
+    }
 }

src/Features/Core/Portable/ReplacePropertyWithMethods/ReplacePropertyWithMethodsCodeRefactoringProvider.cs

@@ -275,6 +275,11 @@ private async Task ReplaceReferencesAsync(
                     editor.ReplaceNode(parent, parent.WithAdditionalAnnotations(
                         ConflictAnnotation.Create(FeaturesResources.Property_reference_cannot_be_updated)));
                 }
+                else if (syntaxFacts.IsNameOfSubpattern(parent))
+                {
+                    editor.ReplaceNode(parent, parent.WithAdditionalAnnotations(
+                        ConflictAnnotation.Create(FeaturesResources.Property_reference_cannot_be_updated)));
+                }
                 else
                 {
                     var fieldSymbol = propertyToBackingField.GetValueOrDefault(property);