C#獲取文件哈希值

    using (HashAlgorithm hash = HashAlgorithm.Create())
    {
     using (FileStream file1 = new FileStream(文件路徑, FileMode.Open))
     {
       byte[] hashByte1 = hash.ComputeHash(file1);
       var hashval = StringToHex.byteToHexStr(hashByte1);          
     }
   }