private void buttonFixBug_Click(object sender, EventArgs e) { dataGridViewList.Hide(); if (fbf == null) { fbf = new FixbugForm(); fbf.MdiParent = this; fbf.FormClosed += fbf_FormClosed; fbf.Show(); } else { fbf.Activate(); } }
void fbf_FormClosed(object sender, FormClosedEventArgs e) { fbf = null; //throw new NotImplementedException(); }