protected void btnDelete_Click(object sender, EventArgs e)
 {
     try
     {
         AgreementManager mgr = new AgreementManager();
         Agreement obj = new Agreement();
         obj.Agreement_ID = txtID.Text.Trim();
         lblError.Text = CustomErrors.CHANGES_ACCEDTED_STATUS + mgr.deleteAgreement(obj);
         ClearControls();
     }
     catch(Exception ex)
     {
         lblError.Text = ex.Message;
     }
 }