Fix crash in replace property with methods

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

@@ -263,13 +263,10 @@ private async Task ReplaceReferencesAsync(
                     editor.ReplaceNode(parent, parent.WithAdditionalAnnotations(
                         ConflictAnnotation.Create(FeaturesResources.Property_referenced_implicitly)));
                 }
-                else if (syntaxFacts.IsMemberInitializerNamedAssignmentIdentifier(parent))
-                {
-                    editor.ReplaceNode(parent, parent.WithAdditionalAnnotations(
-                        ConflictAnnotation.Create(FeaturesResources.Property_reference_cannot_be_updated)));
-                }
-                else if (syntaxFacts.IsNameOfSubpattern(parent))
+                else if (IsInNonUpdatableLocation(syntaxFacts, parent))
                 {
+                    // If the property is in a location where it cannot be updated, then just
+                    // replace it with a warning.
                     editor.ReplaceNode(parent, parent.WithAdditionalAnnotations(
                         ConflictAnnotation.Create(FeaturesResources.Property_reference_cannot_be_updated)));
                 }
@@ -284,6 +281,13 @@ await service.ReplaceReferenceAsync(
                 }
             }
         }
+
+        static bool IsInNonUpdatableLocation(ISyntaxFacts syntaxFacts, SyntaxNode parent)
+        {
+            return syntaxFacts.IsMemberInitializerNamedAssignmentIdentifier(parent) ||
+                syntaxFacts.IsNameOfSubpattern(parent) ||
+                syntaxFacts.IsInNamespaceOrTypeContext(parent);
+        }
     }
 
     private static async Task<Solution> ReplaceDefinitionsWithMethodsAsync(

src/Features/VisualBasicTest/ReplacePropertyWithMethods/ReplacePropertyWithMethodsTests.vb

@@ -8,7 +8,7 @@ Imports Microsoft.CodeAnalysis.ReplacePropertyWithMethods
 
 Namespace Microsoft.CodeAnalysis.Editor.VisualBasic.UnitTests.CodeActions.ReplacePropertyWithMethods
     <Trait(Traits.Feature, Traits.Features.CodeActionsReplacePropertyWithMethods)>
-    Public Class ReplacePropertyWithMethodsTests
+    Public NotInheritable Class ReplacePropertyWithMethodsTests
         Inherits AbstractVisualBasicCodeActionTest_NoEditor
 
         Protected Overrides Function CreateCodeRefactoringProvider(workspace As TestWorkspace, parameters As TestParameters) As CodeRefactoringProvider
@@ -698,5 +698,24 @@ Class C
     End Sub
 End Class")
         End Function
+
+        <Fact, WorkItem("https://github.com/dotnet/roslyn/issues/78642")>
+        Public Async Function TestPropertyNameReferencedInAsClause() As Task
+            Await TestInRegularAndScriptAsync(
+"class C
+    property [||]Goo as Goo
+end class",
+"class C
+    Private _Goo As Goo
+
+    Public Function GetGoo() As Goo
+        Return _Goo
+    End Function
+
+    Public Sub SetGoo(AutoPropertyValue As Goo)
+        _Goo = AutoPropertyValue
+    End Sub
+end class")
+        End Function
     End Class
 End Namespace