private void MTN_DUTY_LIST_LinkClicked(object sender, LinkLabelLinkClickedEventArgs e) { frmMain frmmain = (frmMain)this.ParentForm; if (frmmain.CheckChildFrmExist("MTN_DUTY_LIST") == true) { return; } MTN_DUTY_LIST newFrm = new MTN_DUTY_LIST(); if (newFrm != null && !frmmain.ShowMDIChild(newFrm, newFrm)) { newFrm.Dispose(); newFrm = null; } }