WPF去除标题栏 实现窗体的缩放及拖动效果

WindowStyle="None"
AllowsTransparency="True"  
Background="Transparent"

  
        <WindowChrome CaptionHeight="0" ResizeBorderThickness="5"/>  

<Border MouseLeftButtonDown="ChangeBorder_OnMouseLeftButtonDown"  BorderThickness="2" BorderBrush="CornflowerBlue">  
//这里加Grid的原因是border 鼠标无法选择 所以无法拖动 所以用Grid填充下（其他控件也可以）
Grid>
Border>

private void ChangeBorder_OnMouseLeftButtonDown(object sender, MouseButtonEventArgs e)  
{  
     DragMove();  
}