Fix #551

src/Shared/HandyControl_Shared/Controls/TabControl/TabControl.cs

@@ -331,7 +331,8 @@ namespace HandyControl.Controls
                         Header = item.Header,
                         Width = TabItemWidth,
                         IsChecked = item.IsSelected,
-                        IsCheckable = true
+                        IsCheckable = true,
+                        IsEnabled = item.IsEnabled
                     };
 
                     menuItem.Click += delegate
@@ -429,4 +430,4 @@ namespace HandyControl.Controls
 
         protected override DependencyObject GetContainerForItemOverride() => new TabItem();
     }
-}
+}