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当我绘制折线时,我使用图像刷作为笔划。

var bitmapImage = new Windows.UI.Xaml.Media.Imaging.BitmapImage(new Uri("ms-appx:/Assets/br1.png"));
        img = new Windows.UI.Xaml.Media.ImageBrush()
        {
            ImageSource = bitmapImage,
            Stretch = Stretch.None,
        };

并创建折线:

this._polyline = new Polyline() { 
            StrokeThickness = 23,                
              Stroke = img,                  

        };

但是当我在画布中绘制折线时图像会拉伸。我不能重复图像刷,你能帮我吗?

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