void btnDeleteUnVerified_Click(object sender, EventArgs e) { int daysOld = 90; int.TryParse(txtDaysOld.Text, out daysOld); DateTime cutOffDate = DateTime.UtcNow; if (daysOld > 0) { cutOffDate = DateTime.UtcNow.AddDays(-daysOld); } subscriptions.DeleteUnverified(letterInfoGuid, cutOffDate); WebUtils.SetupRedirect(this, SiteRoot + "/eletter/LetterSubscribers.aspx?l=" + letterInfoGuid.ToString()); }