private void OpenHastaIslemleri()
        {
            HastaIslemleri childForm = HastaIslemleri.HastaIslemleriInstance();

            childForm.MdiParent     = this;
            childForm.StartPosition = FormStartPosition.CenterScreen;
            childForm.Show();
        }
 public static HastaIslemleri HastaIslemleriInstance()
 {
     if (hastaIslemleriInstance != null)
     {
         return(hastaIslemleriInstance);
     }
     else
     {
         return(hastaIslemleriInstance = new HastaIslemleri());
     }
 }
 private void HastaIslemleri_FormClosed(object sender, FormClosedEventArgs e)
 {
     hastaIslemleriInstance = null;
 }