MD5 e SHA256 CheckSum generation

Checksum.cs

public static string GetMD5Checksum(string input)
        {
            using (MD5 md5 = MD5.Create())
            {
                byte[] inputBytes = Encoding.ASCII.GetBytes(input);
                byte[] hashBytes = md5.ComputeHash(inputBytes);

                return BitConverter.ToString(hashBytes).Replace("-", String.Empty);
            }
        }

        public static string GetSha256Checksum(string input)
        {
            var a = input.ToHashSet();
            var sha = new SHA256Managed();
            byte[] checksum = sha.ComputeHash(Encoding.ASCII.GetBytes(input));
            return BitConverter.ToString(checksum).Replace("-", String.Empty);
        }