ASP.NET 4 Unleashed

Saving Profiles Automatically

A profile is loaded from its profile provider the first time that a property from the profile is accessed. For example, if you use a Profile property in a Page_Load() handler, the profile is loaded during the Page Load event. If you use a Profile property in a Page_PreRender() handler, the Profile is loaded during the page PreRender event.

If a Profile property is modified, the Profile is saved automatically at the end of page execution. The ASP.NET Framework can detect automatically when certain types of properties are changed but not others. In general, ASP.NET Framework can detect changes made to simple types but not to complex types.

For example, if you access a property that exposes a simple type such as a string, ...