using System.Security.Cryptography;

public class SHA1_in_CSharp {
    static void Main(string[] args) {
        HashAlgorithm hash = HashAlgorithm.Create("SHA1");
	byte[] input = new byte[30];
	byte[] digest = hash.ComputeHash(input);
        System.Console.WriteLine(System.BitConverter.ToString(digest));
    }
}