title: Checking if email address already exists in db
body: <p>I'm trying to error handle a registration aspx/c# page on my application and want to run a check whether the email address that a user has tried to register already exists as the email address is used as a primary key in my database.</p>
  
  <p>I have tried IF NOT EXISTS/IF EXISTS but these dont give the desired effect so was wondering if there was another way around it?</p>
  
  <p>Look forward to your reply,</p>
  
  <p>Scott</p>