Handle this.<name> expressions.

src/EditorFeatures/CSharpTest/Diagnostics/GenerateVariable/GenerateVariableTests.cs

@@ -7310,6 +7310,37 @@ public Class()
 }");
         }
 
+        [Fact, Trait(Traits.Feature, Traits.Features.CodeActionsGenerateVariable)]
+        public async Task TestPlaceFieldBasedOnSurroundingStatements2()
+        {
+            await TestInRegularAndScriptAsync(
+@"class Class
+{
+    private int foo;
+    private int quux;
+
+    public Class()
+    {
+        this.foo = 0;
+        this.[|bar|] = 1;
+        this.quux = 2;
+    }
+}",
+@"class Class
+{
+    private int foo;
+    private int bar;
+    private int quux;
+
+    public Class()
+    {
+        this.foo = 0;
+        this.bar = 1;
+        this.quux = 2;
+    }
+}");
+        }
+
         [Fact, Trait(Traits.Feature, Traits.Features.CodeActionsGenerateVariable)]
         public async Task TestPlacePropertyBasedOnSurroundingStatements()
         {

src/Features/Core/Portable/GenerateMember/GenerateVariable/AbstractGenerateVariableService.State.cs

@@ -277,14 +277,15 @@ internal bool CanGenerateLocal()
                 // Also, because users often like to keep members/assignments in the same order
                 // we can pick a good place for the new member based on the surrounding assignments.
                 var syntaxFacts = document.Document.GetLanguageService<ISyntaxFactsService>();
-                var simpleName = this.SimpleNameOpt;
+                var simpleName = this.SimpleNameOrMemberAccessExpressionOpt;
 
                 if (syntaxFacts.IsLeftSideOfAssignment(simpleName))
                 {
                     var assignmentStatement = simpleName.Ancestors().FirstOrDefault(syntaxFacts.IsSimpleAssignmentStatement);
                     if (assignmentStatement != null)
                     {
-                        syntaxFacts.GetPartsOfAssignmentStatement(assignmentStatement, out var left, out var right);
+                        syntaxFacts.GetPartsOfAssignmentStatement(
+                            assignmentStatement, out var left, out var right);
 
                         if (left == simpleName)
                         {