fixed a bug of NumericUpDown

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

@@ -159,6 +159,7 @@ namespace HandyControl.Controls
         {
             var ctl = (NumericUpDown) d;
             var v = (double) e.NewValue;
+            ctl._textBox.Text = v.ToString();
 
             ctl.OnValueChanged(new FunctionEventArgs<double>(ValueChangedEvent, ctl)
             {