Событие из другой формы

private void Test()
        {
            label1.Text = "Text";
        }

private void Form2_FormClosing(object sender, FormClosingEventArgs e)
        {
            Form1 frm = new Form1();
            frm.test();
        }

private void button1_Click(object sender, EventArgs e)
{
    Form2 f2 = new Form2();
    f2.FormClosing += new FormClosingEventHandler(f2_FormClosing); //подписываемся на событие
    f2.ShowDialog();
}
 
void f2_FormClosing(object sender, FormClosingEventArgs e)
{
    label1.Text = "Text";
}

public string GetText()
{
    return textBox1.Text;
}

private void button1_Click(object sender, EventArgs e)
{
    Form2 f2 = new Form2();
    f2.FormClosing += new FormClosingEventHandler(f2_FormClosing);
    f2.ShowDialog();
}
 
void f2_FormClosing(object sender, FormClosingEventArgs e)
{
    label1.Text = (sender as Form2).GetText();
}