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Which two message filters should you add to the router?

A Windows Communication Foundation (WCF) solution uses two services to manage a
shopping cart. Service A processes messages containing line items that total between $0
and $500. Service B processes messages containing line items that total more than $500.
All messages are of equal importance to the business logic. You need to route incoming
messages to the appropriate services by using WCF routing. Which two message filters
should you add to the router? (Each correct answer presents part of the solution. Choose
two.)

What should you set the ClientIDMode property of the DropDownList to?

You are developing an ASP.NET Web page. You add a data-bound GridView control. The GridView
contains a TemplateField that includes a DropDownList. You set the GridViews ClientIDMode
property to Static, and you set the ClientIDRowSuffix property to ProductID. You need to be able to
reference individual DropDownList controls from client-side script by using the ProductID. What
should you set the ClientIDMode property of the DropDownList to?