#region 判断图片是否一致       /// 
       /// 判断图片是否一致       /// 
       /// 图片一       /// 图片二       /// 
     
      是否一致
            public bool IsSameImg(Bitmap img, Bitmap bmp)       {           //大小一致           if (img.Width == bmp.Width && img.Height == bmp.Height)           {               //将图片一锁定到内存               BitmapData imgData_i = img.LockBits(new Rectangle(0, 0, img.Width, img.Height), ImageLockMode.ReadOnly, PixelFormat.Format24bppRgb);               IntPtr ipr_i = imgData_i.Scan0;               int length_i = imgData_i.Width * imgData_i.Height * 3;               byte[] imgValue_i = new byte[length_i];               Marshal.Copy(ipr_i, imgValue_i, 0, length_i);               img.UnlockBits(imgData_i);               //将图片二锁定到内存               BitmapData imgData_b = img.LockBits(new Rectangle(0, 0, img.Width, img.Height), ImageLockMode.ReadOnly, PixelFormat.Format24bppRgb);               IntPtr ipr_b = imgData_b.Scan0;               int length_b = imgData_b.Width * imgData_b.Height * 3;               byte[] imgValue_b = new byte[length_b];               Marshal.Copy(ipr_b, imgValue_b, 0, length_b);               img.UnlockBits(imgData_b);               //长度不相同               if (length_i != length_b)               {                   return false;               }               else               {                   //循环判断值                   for (int i = 0; i < length_i; i++)                   {                       //不一致                       if (imgValue_i[i] != imgValue_b[i])                       {                           return false;                       }                   }                   return true;               }           }           else           {               return false;           }       }       #endregion