using System;

using System.Globalization;

using System.Security.Cryptography;

​

public class Program

{

    public static void Main()

    {

        byte[] data=new byte[]{0x01,0x02, 0x03,0x04};

        var hasher=SHA1.Create();

        var hash=hasher.ComputeHash(data);

        Convert.ToHexString(hash).Dump();       

        // 12DADA1FFF4D4787ADE3333147202C3B443E376F     

    }

}