There are 3 types: In-process storage. Session State Service. Microsoft SQL Server. In-Process Storage The default location for session state storage is in the ASP.NET process itself. Session State Service As an alternative to using in-process storage for session state, ASP.NET provides the ASP.NET State Service. The State Service gives you an out-of-process alternative for storing session state that is not tied quite so closely to ASP.NET’s own process. To use the State Service, you need to edit the sessionstate element in your ASP.NET application’s web.config file: You’ll also need to start the ASP.NET State Service on the computer that … Click here to continue reading.