public static string MD5HashCrypt(string val)
{
    byte[] data = Encoding.ASCII.GetBytes(val);
    MD5 md5 = new MD5CryptoServiceProvider();
    byte[] result = md5.ComputeHash(data);

    //return Encoding.ASCII.GetString(result);
    return Convert.ToBase64String(result);
}

public static string SHA1HashCrypt(string val)
{
    byte[] data = Encoding.ASCII.GetBytes(val);
    SHA1 sha = new SHA1CryptoServiceProvider();
    byte[] result = sha.ComputeHash(data);

    //return Encoding.ASCII.GetString(result);
    return Convert.ToBase64String(result);
}