/// <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));             }         }     }