高手请关注：WinCE6 用C#程序进行2个文件比较，使用Hashcode计算值比较就可能失败，但是用byte比较却通过。请教什么原因

bytes = new byte[1];rand.NextBytes(bytes);newFile.Append(bytes[0], 2000000 + rand.Next(1000000, 2000000));//ComputeHash from firstFile and get a byte[].//System.Security.Cryptography.HashAlgorithmFileStream fs1 = File.Open(firstFile);String hash1 = String.Empty;foreach (byte b in HashAlgorithm.ComputeHash(fs1)) hash1 += b.ToString("x2").ToLower();//copy from firstFile to secondFilefInfo.CopyTo(secondFile, true);//ComputeHash from secondFile and get a byte[].FileStream fs2 = File.Open(secondFile);String hash = String.Empty;foreach (byte b in HashAlgorithm.ComputeHash(fs2)) hash2 += b.ToString("x2").ToLower();//compare two hashif (!hash2.Equals(hash1)){     //fail}

        private bool FileCompare(string file1Path, string file2Path)         {             //if two file are point to one file. it is same            if(file1Path == file2Path)             {                 return true;            }                         int file1byte = 0;             int file2byte = 0;                          using(FileStream fs1 = new FileStream(file1Path, FileMode.Open),                              fs2 = new FileStream(file2Path, FileMode.Open))             {                 if(fs1.Length != fs2.Length)                 {                     fs1.Close();                     fs2.Close();                     return false;                 }                do                {                    //read each byte from each file                    file1byte = fs1.ReadByte();                    file2byte = fs2.ReadByte();                }                while ((file1byte == file2byte) && (file1byte != -1));                                fs1.Close();                fs2.Close();                                return ((file1byte - file2byte) == 0);             }        }