# System.Windows.Forms.Design

``` diff
 namespace System.Windows.Forms.Design {
     public class ControlDesigner : ComponentDesigner {
-        public override void InitializeExistingComponent(IDictionary defaultValues);
+        public override void InitializeExistingComponent(IDictionary? defaultValues);
-        public override void InitializeNewComponent(IDictionary defaultValues);
+        public override void InitializeNewComponent(IDictionary? defaultValues);
     }
 }
```

