telegram-bot/Core/Service/Hash.cs

using System.Security.Cryptography;
using System.Text;

namespace Kruzya.TelegramBot.Core.Service
{
    public class Hash
    {
        public string GenerateHash(string input)
        {
            var output = string.Empty;
            var hashedBytes = SHA256.HashData(Encoding.UTF8.GetBytes(input));

            foreach (var b in hashedBytes)
            {
                output += string.Format("{0,2:x2}", b);
            }

            return output;
        }
    }
}