title: CustomValidator time c#.net
body: <p>I have using c#.net.</p>
  
  <p>I have a textbox which should contain a time. It needs to be in 24 hour format.</p>
  
  <p>I would like to use a CustomValidator but can’t find anything on the net.</p>
  
  <p>Thanks in advance for any help</p>
  
  <p>Clare</p>