请教在WPF中怎么快速计算出window上面的button位置的百分比

请问在WPF中如何快速计算出window上面的button位置的百分比？
请问在Visual Studio中如果把button拖到窗口上，如何让这个button的大小以及位置是以百分比来计算的，这样当窗体大小该百年时，button的大小和位置也会相应改变？

[解决办法]
因为你这个比例的依据可以有多种考量，最简单就是根据分配空间的百分比进行计算
MyButton

C# code

public class MyButton : Button {    public MyButton() {        HorizontalAlignment = System.Windows.HorizontalAlignment.Center;        VerticalAlignment = System.Windows.VerticalAlignment.Center;    }    public double WidthPercentage {        get { return (double)GetValue(WidthPercentageProperty); }        set { SetValue(WidthPercentageProperty, value); }    }    public double HeightPercentage {        get { return (double)GetValue(HeightPercentageProperty); }        set { SetValue(HeightPercentageProperty, value); }    }    public static readonly DependencyProperty HeightPercentageProperty =        DependencyProperty.Register("HeightPercentage", typeof(double), typeof(MyButton), new UIPropertyMetadata(0.0));    public static readonly DependencyProperty WidthPercentageProperty =        DependencyProperty.Register("WidthPercentage", typeof(double), typeof(MyButton), new UIPropertyMetadata(0.0));    protected override Size MeasureOverride(Size constraint) {        var result = new Size(constraint.Width * WidthPercentage, constraint.Height * HeightPercentage);        return result;    }    protected override Size ArrangeOverride(Size arrangeBounds) {        return base.ArrangeOverride(arrangeBounds);    }}