剪贴板

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

        private void button1_Click(object sender, EventArgs e)
        {
            if (string.IsNullOrEmpty(richTextBox1.Text.Trim()) || string.IsNullOrEmpty(richTextBox1.SelectedText.Trim()))
            {
                return;
            }
            Clipboard.SetDataObject(richTextBox1.SelectedText.Trim(), true);
        }

        private void button2_Click(object sender, EventArgs e)
        {
            IDataObject ido = Clipboard.GetDataObject();
            richTextBox1.Text += (string)ido.GetData(DataFormats.Text);
        }
    }
}