c# 读取图片文件

        /// <summary>
        /// 通过FileStream 来打开文件，这样就可以实现不锁定Image文件，到时可以让多用户同时访问Image文件
        /// </summary>
        /// <param name="path"></param>
        /// <returns></returns>
        public static Bitmap ReadImageFile(string path)
        {
            FileStream fs = File.OpenRead(path); //OpenRead
            int filelength = ;
            filelength = (int)fs.Length; //获得文件长度
            Byte[] image = new Byte[filelength]; //建立一个字节数组
            fs.Read(image, , filelength); //按字节流读取
            System.Drawing.Image result = System.Drawing.Image.FromStream(fs);
            fs.Close();
            Bitmap bit = new Bitmap(result);
            return bit;
        }