You create an ASP.NET page that allows a user to enter a requested delivery date in a TextBox control named txtDelDate. The date must be no earlier than two business days after the order date - and no later that 60 business days after the order date. You add a CustomValidator control to your page. In the Properties window - you set the ControlToValidate property to txtDelDate. You need to ensure that the date entered in the txtDelDate TextBox control falls within the acceptable range of values. In addition - you need to minimize the number of round trips to the server. What should you do?

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