/// <summary>
    /// 判断两个文件内容是否一致
    /// </summary>
    public static bool IsFilesEqual(string fileName1, string fileName2)
    {
        using (HashAlgorithm hashAlg = HashAlgorithm.Create())
        {
            using (FileStream fs1 = new FileStream(fileName1, FileMode.Open), fs2 = new FileStream(fileName2, FileMode.Open))
            {
                byte[] hashBytes1 = hashAlg.ComputeHash(fs1);
                byte[] hashBytes2 = hashAlg.ComputeHash(fs2);
                // 比较哈希码
                return (BitConverter.ToString(hashBytes1) == BitConverter.ToString(hashBytes2));
            }
        }


    }