# System.Windows.Forms.Design

``` diff
 namespace System.Windows.Forms.Design {
     public class ControlDesigner : ComponentDesigner {
         public class ControlDesignerAccessibleObject : AccessibleObject {
-            public override string Description { get; }
+            public override string? Description { get; }
-            public override AccessibleObject Parent { get; }
+            public override AccessibleObject? Parent { get; }
-            public override string Value { get; }
+            public override string? Value { get; }
-            public override AccessibleObject GetChild(int index);
+            public override AccessibleObject? GetChild(int index);
-            public override AccessibleObject GetFocused();
+            public override AccessibleObject? GetFocused();
-            public override AccessibleObject GetSelected();
+            public override AccessibleObject? GetSelected();
-            public override AccessibleObject HitTest(int x, int y);
+            public override AccessibleObject? HitTest(int x, int y);
         }
     }
 }
```

