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private string FormText = "Test";
private Form2 frm;
public Form1()
{
InitializeComponent();
this.Text = FormText;
}
private void button1_Click(object sender, EventArgs e)
{
frm = new Form2();
frm.button1.Click += new EventHandler(ChangeValue);
frm.Show();
}
void ChangeValue(object sender, EventArgs e)
{
this.FormText = frm.textBox1.Text;
this.Text = this.FormText;
}