生成软件hash值：

private string GetEXEHashString()
{
    //获得软件哈希值
    Process currProcess = Process.GetCurrentProcess();
    string filePath = currProcess.MainModule.FileName;
    string hashEXE = string.Empty;
    using (FileStream fs = new FileStream(filePath, FileMode.Open, FileAccess.Read))
    {
        //  hash 算法
        MD5 algorithm = MD5.Create();

        byte[] hashData = algorithm.ComputeHash(fs);
        hashEXE = ByteArrayToHexString(hashData);
        fs.Close();
    }
    Console.WriteLine(hashEXE.ToString());
    Info("GetEXEHashString :hashEXE = " + hashEXE.ToString());
    return hashEXE.ToString();
}

private static string ByteArrayToHexString(byte[] bytes)
{
    int length = bytes.Length;

    StringBuilder sb = new StringBuilder();

    foreach (byte data in bytes)
    {
        sb.Append(data.ToString("x2"));
    }

    return sb.ToString();
}

生成文件hash值

 public static String ComputeMD5(String fileName)
 {
     String hashMD5 = String.Empty;
     //检查文件是否存在，如果文件存在则进行计算，否则返回空值
     if (System.IO.File.Exists(fileName))
     {

         using (System.IO.FileStream fs = new System.IO.FileStream(fileName, System.IO.FileMode.Open, System.IO.FileAccess.Read))
         {
             //计算文件的MD5值
             System.Security.Cryptography.MD5 calculator = System.Security.Cryptography.MD5.Create();

             Byte[] buffer = calculator.ComputeHash(fs);
             calculator.Clear();
             //将字节数组转换成十六进制的字符串形式
             StringBuilder stringBuilder = new StringBuilder();
             for (int i = 0; i < buffer.Length; i++)
             {
                 stringBuilder.Append(buffer[i].ToString("x2"));
             }
             hashMD5 = stringBuilder.ToString();
         }//关闭文件流
     }//结束计算
     return hashMD5;
 }//ComputeMD5