... this case, ASP. NET passes in a normal HtmlTextWriter into the RenderControl method. However, if you happen to get a request from a lesser browser that understands only HTML 3. 2, ASP. NET passes ... browser capabilities confi guration help ASP. NET fi gure out what kind of HtmlTextWriter to use. The browser capability information deduced by the ASP. NET runtime may be used for more than simply ... containing the control. Tell ASP. NET to assign unique IDs for the child controls within either type of composite controlDerive the binary composite control from ASP. NET s CompositeControl class....