//A0.01 Start
 private void userManagementToolStripMenuItem_Click(object sender, EventArgs e)
 {
     if (userMngForm == null || userMngForm.IsDisposed)
     {
         userMngForm           = new UserMngForm(this); //A0.02
         userMngForm.MdiParent = this;
         userMngForm.Show();
         userMngForm.Focus();
     }
     else
     {
         userMngForm.rework();
         userMngForm.Focus();
     }
 }
 private void UserMngMenuItem_Click(object sender, EventArgs e)
 {
     try
     {
         if (userMngForm == null || userMngForm.IsDisposed)
         {
             userMngForm           = new UserMngForm(this);
             userMngForm.MdiParent = this;
             //userMngForm.WindowState = FormWindowState.Normal;
             //userMngForm.WindowState = FormWindowState.Maximized;
             userMngForm.Show();
             userMngForm.Focus();
         }
         else
         {
             userMngForm.rework();
             userMngForm.Focus();
         }
     }
     catch (Exception ex)
     {
         logger.Error(ex, "Exception:");
     }
 }