How do I make a checkbox required on an ASP.NET form?

Question

I\'ve done some searching on this, and I\'ve found several partial answers, however nothing that gives me that warm fuzzy \"this is the right way to do this\". To answer the

Answer 1

C# version of andrew's answer:

Code-behind:

protected void CustomValidator1_ServerValidate(object source, ServerValidateEventArgs args)
{
    args.IsValid = CheckBox1.Checked;
}