单项选择题 You create a Microsoft ASP.NET application by using the Microsoft .NET Framework version 3.5.  You add an XmlDataSource control named XmlDataSource1 to the Web page. XmlDataSource1 is bound to an XML document with the following structure.  You also write the following code segment in the code-behind file of the Web page.  You need to add a BulletedList control named BulletedList1 to the Web page that is bound to XmlDataSource1.  Which code fragment should you use?（）

单项选择题 You create a Microsoft ASP.NET application by using the Microsoft .NET Framework version 3.5.  You derive a new validation control from the BaseValidator class.  The validation logic for the control is implemented in the Validate method in the following manner. Protected Overloads Function Validate( _  ByVal value As String) As Boolean  ...  End Function  You need to override the method that validates the value of the related control.  Which override method should you use?（）

单项选择题 You create a Microsoft ASP.NET application by using the Microsoft .NET Framework version 3.5.  You derive a new validation control from the BaseValidator class.  The validation logic for the control is implemented in the Validate method in the following manner. protected static bool Validate(string value) {  ...  }  You need to override the method that validates the value of the related control.  Which override method should you use?（）