Fix failure to handle expression-bodied local functions

src/EditorFeatures/CSharpTest/AssignOutParameters/AssignOutParametersAboveReturnTests.cs

@@ -348,18 +348,24 @@ void X()
         [Fact, Trait(Traits.Feature, Traits.Features.CodeActionsAssignOutParameters)]
         public async Task TestMissingForLocalFunctionExpressionBody()
         {
-            // Not desirable.  Happens because error is not reported on expr-body
-            // like for lambdas.
-            var code = @"class C
+            await VerifyCS.VerifyCodeFixAsync(
+@"class C
 {
     void X()
     {
         char {|CS0177:D|}(out int i) => 'a';
         D(out _);
     }
-}";
+}",
+@"class C
+{
+    void X()
+    {
+        char D(out int i) { i = 0; return 'a'; }
 
-            await VerifyCS.VerifyCodeFixAsync(code, code);
+        D(out _);
+    }
+}");
         }
 
         [Fact, Trait(Traits.Feature, Traits.Features.CodeActionsAssignOutParameters)]

src/Features/CSharp/Portable/AssignOutParameters/AssignOutParametersAboveReturnCodeFixProvider.cs

@@ -42,6 +42,14 @@ protected override void TryRegisterFix(CodeFixContext context, Document document
         {
             var generator = editor.Generator;
 
+            if (exprOrStatement is LocalFunctionStatementSyntax { ExpressionBody: { } localFunctionExpressionBody })
+            {
+                // Expression-bodied local functions report CS0177 on the method name instead of the expression.
+                // Reassign exprOrStatement so the code fix implementation works as it does for other expression-bodied
+                // members.
+                exprOrStatement = localFunctionExpressionBody.Expression;
+            }
+
             var parent = exprOrStatement.Parent;
             if (parent.IsEmbeddedStatementOwner())
             {