Guid newPK = (Guid)dsBeneficiary.Tables[0].Rows[dsBeneficiary.Tables[0].Rows.Count - 1]["BeneficiaryPK"];>
this.oBeneficiary.NewRow(dsBeneficiary, this.oBeneficiary.TableName);>
entity.BeneficiaryPK = Guid.NewGuid();>
System.InvalidCastException was unhandled by user code > Message="Specified cast is not valid." > Source="SamaanSystems.IAS.Web" > StackTrace: > at SamaanSystems.IAS.Web.PolicyEdit.btnAddBeneficiary_Click(Object sender, EventArgs e) in C:\Development\Mere Mortals .NET Framework 2008\SamaanSystems\IAS.Web\PolicyEdit.aspx.cs:line 592 > at System.Web.UI.WebControls.LinkButton.OnClick(EventArgs e) > at System.Web.UI.WebControls.LinkButton.RaisePostBackEvent(String eventArgument) > at System.Web.UI.WebControls.LinkButton.System.Web.UI.IPostBackEventHandler.RaisePostBackEvent(String eventArgument) > at System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler sourceControl, String eventArgument) > at System.Web.UI.Page.RaisePostBackEvent(NameValueCollection postData) > at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) > InnerException:>