文件和二进制流的相互转换

/// <summary>
        /// 把文件转化为二进制流
        /// </summary>
        /// <param name="Path"></param>
        /// <returns></returns>
        public static byte[] ConvertToBinary(string Path)
        {
            FileStream stream = new FileInfo(Path).OpenRead();
            byte[] buffer = new byte[stream.Length];
            stream.Read(buffer, 0, Convert.ToInt32(stream.Length));
            return buffer;
        }

/// <summary>
        /// 把二进制流转化为文件
        /// </summary>
        public static void GetFile()
        {
            string filePath = "D://a.jpg";   //文件路径
            //二进制流数据 br
            byte[] br = ConvertToBinary(filePath);
            FileStream fstream = File.Create(filePath, br.Length);
            try
            {
                fstream.Write(br, 0, br.Length);   //二进制转换成文件
            }
            catch (Exception ex)
            {
                //抛出异常信息
            }
            finally
            {
                fstream.Close();
            }
        }