Now I'm an MCP

I passed 70-315 yesterday; it was easier than I expected.
What I didn't expect was that I'd actually learn a few things from the test. For example:

1. The DataGrid class (control) has a read-only property named Columns of type DataGridColumnCollection.
   
   The DataGridColumnCollection type is a collection of objects derived from DataGridColumn (such as BoundColumn).
   
   DataGridColumn has a read-only property named ItemStyle of type TableItemStyle.
   
   The TableItemStyle class has a property named CssClass.
   
   So, setting datagrid.columns[0].ItemStyle.CssClass = "myClass" can be done in the page-in-front as:
   
   <asp:DataGrid runat="server" id="datagrid">
   <Columns>
   <asp:BoundColumn DataField="name">
   <ItemStyle CssClass="myClass" />
   </asp:BoundColumn>
   </Columns>
   </asp:DataGrid>
   
   or
   
   <asp:DataGrid runat="server" id="datagrid">
   <Columns>
   <asp:BoundColumn DataField="name" ItemStyle-CssClass="myClass"/>
   </Columns>
   </asp:DataGrid>
   
   
2. Using the RequiredFieldValidator's InitialValue is useful when you want the user to select any item except the first in a drop down list.