title: Enable/Disable SubmenuItems on Mdi Parent form in C# using Windows Application?
body: <p>on Mdi parent form i am calling my child forms using menu items. on Child form Load my Menu item should be disabled on child form closed it will again Enabled.., i try FormClosing event handler i get the answer.., </p>
  
  <pre><code>  private void btnMn1_Click(object sender, EventArgs e)
      {
          Forms.Cnblfrm cnbfrm = new Cnsmblfrm();
          cnsmbfrm.MdiParent = this;
          cnsmbfrm.Text = btnMn1.Text;
          cnsmbfrm.Show();
          this.btnMn1.Enabled = false;
          cnbfrm.FormClosed += new FormClosedEventHandler(cnsmbfrm_FormClosed);
      }
  
      void cnbfrm_FormClosed(object sender, FormClosedEventArgs e)
      {
          btnMn1.Enabled = true;
          //throw new NotImplementedException();
      }
  </code></pre>
  
  <p>by using the above code i am getting the answer but i have morethan 20 ChildForms. By using this method My coding is increasing...., there is any method instead of this....,</p>