.NET Core压缩图片为小尺寸

   //压缩图片
                int width = 200;
                using (var imgBmp = new Bitmap(@"d:\壁纸\b2.jpg"))
                {
    
    
                    //找到新尺寸
                    int oWidth = imgBmp.Width;
                    int oHeight = imgBmp.Height;
                    int height = oHeight;
                    if (width > oWidth)
                    {
    
    
                        width = oWidth;
                    }
                    else
                    {
    
    
                        height = width * oHeight / oWidth;
                    }
                    var newImg = new Bitmap(imgBmp, width, height);      
                    //保存到本地
                    newImg.Save("d:/ys_7777.jpg");
                    newImg.Dispose();
                }