# System.ComponentModel.Design

``` diff
 namespace System.ComponentModel.Design {
     public class DesignerActionList {
-        public DesignerActionList(IComponent component);
+        public DesignerActionList(IComponent? component);
-        public IComponent Component { get; }
+        public IComponent? Component { get; }
-        public object GetService(Type serviceType);
+        public object? GetService(Type serviceType);
     }
     public class DesignerActionListCollection : CollectionBase {
-        public DesignerActionListCollection(DesignerActionList[] value);
+        public DesignerActionListCollection(DesignerActionList?[] value);
-        public void AddRange(DesignerActionList[] value);
+        public void AddRange(DesignerActionList?[] value);
-        public void CopyTo(DesignerActionList[] array, int index);
+        public void CopyTo(DesignerActionList?[] array, int index);
     }
 }
```

