之前用PySide6实现了Base64的编码解码，但如果需要作为小工具给别人用，还是有点麻烦，需要打包等，然后包还不小。于是回到C#的WinForm试试，虽然界面就这样，但真心挺好用的，又小又快捷，自带各种转换，便宜大碗~~~

源码如下

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;


namespace LearnWinFrom
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void Btn_Encode(object sender, EventArgs e)
        {
            string txtIn = txt_txt.Text;
            byte[] b = Encoding.Default.GetBytes(txtIn);
            string result = Convert.ToBase64String(b);
            txt_result.Text = result;
        }

        private void Btn_Decode(object sender, EventArgs e)
        {
            string txtIn = txt_txt.Text;
            byte[] b = Convert.FromBase64String(txtIn);
            string result = Encoding.UTF8.GetString(b);
            txt_result.Text = result;
        }

        private void Btn_Exchange(object sender, EventArgs e)
        {
            string tmp = txt_txt.Text;
            txt_txt.Text = txt_result.Text;
            txt_result.Text = tmp;
        }
    }
}