diff --git a/reference/csharp/ui/src/ui_container.cs b/reference/csharp/ui/src/ui_container.cs
index 97c1fc71..0cb9c230 100644
--- a/reference/csharp/ui/src/ui_container.cs
+++ b/reference/csharp/ui/src/ui_container.cs
@@ -79,19 +79,19 @@ public class Example : Efl.Csharp.Application
 
         // Create some boxes and set them as the content of the first pane of the container
         var box = CreateBox(win);
-        Efl.IContentConcrete.static_cast(vsplit.GetPart("first")).SetContent(box);
+        (vsplit.GetPart("first") as Efl.IContent).SetContent(box);
 
         // Create a second, horizontally-split panes container and set it as the content of
         // the second pane of the first container
         Efl.Ui.Panes hsplit = new Efl.Ui.Panes(win);
         hsplit.SetDirection(Efl.Ui.Dir.Horizontal);
         hsplit.SetSplitRatio(0.85);
-        Efl.IContentConcrete.static_cast(vsplit.GetPart("second")).SetContent(hsplit);
+        (vsplit.GetPart("second") as Efl.IContent).SetContent(hsplit);
 
         // Create a table and set it as the content of the first pane of the horizontal
         // container
         var table = CreateTable(win);
-        Efl.IContentConcrete.static_cast(hsplit.GetPart("first")).SetContent(table);
+        (hsplit.GetPart("first") as Efl.IContent).SetContent(table);
 
         // Create a button and set it as the content of the second pane of the horizontal
         // container
@@ -102,7 +102,7 @@ public class Example : Efl.Csharp.Application
             // Exit the EFL main loop
             Efl.Ui.Config.Exit();
         };
-        Efl.IContentConcrete.static_cast(hsplit.GetPart("second")).SetContent(quit_btn);
+        (hsplit.GetPart("second") as Efl.IContent).SetContent(quit_btn);
     }
 
 #if WIN32