經過高人指教之后的代碼：

using System;
using System.Windows.Forms;
using System.Drawing;

namespace MyApplication
{
??? public partial class Form1 : Form
??? {
??????? private delegate void ShowText();
??????? TextBox textBox1 = new TextBox();
??????? Button button1 = new Button();

??????? public Form1()
??????? {
??????????? textBox1.Text = "Hello world!";
??????????? textBox1.Location = new Point((Width - textBox1.Width) / 3, (Height - textBox1.Height) / 3);
??????????? textBox1.Parent = this;
??????????? button1.Text = "button1";
??????????? button1.Location = new Point(textBox1.Left + textBox1.Width + 8, textBox1.Top);
??????????? button1.Click += new EventHandler(button1_Click);
??????????? button1.Parent = this;
??????????? this.ShowDialog();
??????? }

??????? void button1_Click(Object sender, EventArgs e)
??????? {
??????????? Invoke(new ShowText(DoShowText));
??????? }

??????? void DoShowText()
??????? {
??????????? MessageBox.Show(textBox1.Text);
??????? }

??????? static void Main()
??????? {
??????????? Form1 form1 = new Form1();
??????? }
??? }
}

轉載于:https://www.cnblogs.com/min10/archive/2008/10/09/1307367.html

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