private void صرفاصنافلقسمToolStripMenuItem_Click(object sender, EventArgs e) { if (categoryToDepartment == null) { categoryToDepartment = new categoryToDepartment(); categoryToDepartment.MdiParent = this; categoryToDepartment.FormClosed += new FormClosedEventHandler(categoryToDepartment_FormClosed); categoryToDepartment.Show(); } else { categoryToDepartment.Activate(); } }
void categoryToDepartment_FormClosed(object sender, FormClosedEventArgs e) { //throw new NotImplementedException(); categoryToDepartment = null; }