hashgenerator

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.IO;
using System.Security.Cryptography;

namespace HashEvaluator
{
    class Program
    {
        static string Calc_md5(string input)
        {
            // step 1, calculate MD5 hash from input
            MD5 md5 = System.Security.Cryptography.MD5.Create();
            byte[] inputBytes = System.Text.Encoding.ASCII.GetBytes(input);
            byte[] hash = md5.ComputeHash(inputBytes);

            // step 2, convert byte array to hex string
            StringBuilder sb = new StringBuilder();
            for (int i = 0; i < hash.Length; i++)
            {
                sb.Append(hash[i].ToString("X2"));
            }
            return sb.ToString();
        }
        static string Calc_sha1(string input)
        {
            SHA1 sha1 = System.Security.Cryptography.SHA1.Create();
            byte[] inputBytes = System.Text.Encoding.ASCII.GetBytes(input);
            byte[] hash = sha1.ComputeHash(inputBytes);

            // step 2, convert byte array to hex string
            StringBuilder sb = new StringBuilder();
            for (int i = 0; i < hash.Length; i++)
            {
                sb.Append(hash[i].ToString("X2"));
            }
            return sb.ToString();
        }

        static string file_MD5(string path)
        {
            using (var md5 = MD5.Create())
            {
                using (var stream = File.OpenRead(path))
                {
                    var hash = md5.ComputeHash(stream);
                    return BitConverter.ToString(hash).Replace("-", "").ToLowerInvariant();
                }
            }
        }

        static string file_SHA1(string path)
        {
            using (var sha1 = SHA1.Create())
            {
                using (var stream = File.OpenRead(path))
                {
                    var hash = sha1.ComputeHash(stream);
                    return BitConverter.ToString(hash).Replace("-", "").ToLowerInvariant();
                }
            }
        }
        static void Main(string[] args)
        {
            Console.Write("Enter in string: ");
            string input = Console.ReadLine();
            Console.WriteLine("MD5 HASH: " + Calc_md5(input));
            Console.WriteLine("SHA1 HASH: " + Calc_sha1(input));
            Console.Write("Enter a filepath: ");
            input = Console.ReadLine();
            Console.WriteLine("MD5 HASH: " + file_MD5(input));
            Console.WriteLine("SHA1 HASH: " + file_SHA1(input));
        }
    }
}