add tests for With ref-return properties

Author: Timur Kelman

Tests/TestData/MultiFileCharacterization/SourceFiles/VisualBasicUsesCSharpRefReturn/WithRefReturnStructure.vb

@@ -13,10 +13,15 @@
         Dim lst As CSharpRefReturn.RefReturnList(Of SomeStruct)
         Dim s As String
 
-        'With lst(0)
-        '    .P = s
-        '    s = .P
-        'End With
+        With lst(0)
+            .P = s
+            s = .P
+        End With
+
+        With lst.RefProperty
+            .P = s
+            s = .P
+        End With
     End Sub
 
     Structure SomeStruct

Tests/TestData/MultiFileCharacterization/VBToCSResults/ConvertVbUsingCSharpRefReturnOnly/VisualBasicUsesCSharpRefReturn/WithRefReturnStructure.cs

@@ -17,13 +17,20 @@ public void UseArr()
 
         public void UseRefReturn()
         {
-            CSharpRefReturn.RefReturnList<SomeStruct> lst;
-            string s;
+            var lst = default(CSharpRefReturn.RefReturnList<SomeStruct>);
+            var s = default(string);
+
+            {
+                ref var withBlock = ref lst[0];
+                withBlock.P = s;
+                s = withBlock.P;
+            }
 
-            // With lst(0)
-            // .P = s
-            // s = .P
-            // End With
+            {
+                ref var withBlock1 = ref lst.RefProperty;
+                withBlock1.P = s;
+                s = withBlock1.P;
+            }
         }
 
         public struct SomeStruct