using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Helper
{
    public class Base64Helper

    {
        public string Base64 { get; set; } = string.Empty;

        public string Base64Encoded { get; set; } = string.Empty;

        public string GetBase64() => Base64.EncodeBase64();

        public string DecodeBase64() => Base64.DecodeBase64();
    }
    public static class EncodeExtensions
    {
        public static string EncodeBase64(this string text) =>
            Convert.ToBase64String(Encoding.ASCII.GetBytes(text.ToString() ?? throw new Exception("T Base64 is null.")));

        public static string DecodeBase64(this string base64) =>
            Encoding.UTF8.GetString(Convert.FromBase64String(base64 ?? throw new Exception("String Base64 is null.")));

        public static byte[] DecodeBase642ByteArray(string base64) =>
            Convert.FromBase64String(base64 ?? throw new Exception("String Base64 is null."));

    }
}

    public class MyStringBase64
    {

}