private void Form1_Load(object sender, EventArgs e)
 {
     if (fr == null || fr.IsDisposed)
     {
         fr           = new Formlar.FrmAnaSayfa();
         fr.MdiParent = this;
         fr.Show();
     }
 }
 private void BtnAnaForm_ItemClick(object sender, DevExpress.XtraBars.ItemClickEventArgs e)
 {
     if (fr == null || fr.IsDisposed)
     {
         fr = new Formlar.FrmAnaSayfa();
     }
     fr.MdiParent = this;
     fr.Show();
 }