private void button2_Click_1(object sender, EventArgs e) { if (A_frm == null || A_frm.IsDisposed) //是否有释放 { A_frm = new FrmAboubt(); A_frm.TopMost = true; A_frm.Show(); } }
private void Button2_Click(object sender, EventArgs e) { FrmAboubt frm = new FrmAboubt(); frm.Show(); }