Base64 Encode/Decode | String Extension Class

public static class StringExtend
{
    public static string ToBase64(this string input)
    {
        return Convert.ToBase64String(Encoding.UTF8.GetBytes(input));
    }

    public static string FromBase64(this string input)
    {
        return Encoding.UTF8.GetString(Convert.FromBase64String(input));
    }
}