添加一个窗体,名为form2,原窗体名为form1,工程名为 form ,双击Form2.Designer.cs:将 private System.Windows.Forms.TextBox textBox1; 改为:public System.Windows.Forms.TextBox textBox1; form1中的命令按钮的单击代码: using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Text; using System.Windows.Forms;namespace form { public partial class Form1 : Form { public Form2 f2 = new Form2(); public Form1() { InitializeComponent(); }