One of the most ViewState heavy controls is the DropDownList. It stores in ViewState the Text and Value for every ListItem in the DropDownList. This means large Lists can get really nasty when ViewState comes into play. They also include all of these entries a second time because they're all in the html. Being in the html will only slow the page ...

One question that seems to come up often in the asp.net forums is from people who are trying to access controls within controls using templates. LoginViews and CreateUserWizard controls are two commonly used templated controls. These templated controls don't actually have their contents known until run-time because it is dependant on ...