optimized performance

src/Shared/HandyControl_Shared/Controls/Input/TextBox.cs

@@ -36,7 +36,7 @@ namespace HandyControl.Controls
         public bool IsError
         {
             get => (bool) GetValue(IsErrorProperty);
-            set => SetValue(IsErrorProperty, value);
+            set => SetValue(IsErrorProperty, ValueBoxes.BooleanBox(value));
         }
 
         /// <summary>
@@ -72,7 +72,7 @@ namespace HandyControl.Controls
         public bool ShowClearButton
         {
             get => (bool) GetValue(ShowClearButtonProperty);
-            set => SetValue(ShowClearButtonProperty, value);
+            set => SetValue(ShowClearButtonProperty, ValueBoxes.BooleanBox(value));
         }
 
         public virtual bool VerifyData()