protected override void Execute(CodeActivityContext context)
{
var wfContext = context.GetExtension <IWorkflowContext>();
var id = wfContext.PrimaryEntityId;
var servicefactory = context.GetExtension <IOrganizationServiceFactory>();
var service = servicefactory.CreateOrganizationService(null);
AgreementService agreementService = new AgreementService(service);
agreementService.DeleteAllArgementInvoiceWhithTypeEqAuthomatic(id);
agreementService.CreatePaymentScheduleForEachMonth();
agreementService.SetPaymentPlanDate();
}