private void BtnMarkaİstatistik_ItemClick(object sender, DevExpress.XtraBars.ItemClickEventArgs e)
 {
     if (fr5 == null || fr5.IsDisposed)
     {
         fr5           = new Formlar.FrmMarkalar();
         fr5.MdiParent = this;
         fr5.Show();
     }
 }
 private void BtnMarkaİst_ItemClick(object sender, DevExpress.XtraBars.ItemClickEventArgs e)
 {
     Formlar.FrmMarkalar fr = new Formlar.FrmMarkalar();
     fr.MdiParent = this;
     fr.Show();
 }