C# Bitmap 缩放拉伸

对Bitmap对象的一些缩放拉伸的方法

1.Bitmap map = new (image, width, height);
2.using(Griphics gra = Griphics.FromImage(map))
{
    gra.DrawImage(BitmapScreen,
                    new Rectangle(_drawingRect.X, _drawingRect.Y, _drawingRect.Width, _drawingRect.Height),
                    new Rectangle(0, 0, BitmapScreen.Width, BitmapScreen.Height),
                    GraphicsUnit.Pixel);
}