Out-of-process Mode Included with the .NET SDK is a Windows® NT service: ASPState. This Windows service is what ASP.NET uses for out-of-process session state management. To use this state manager, you first need to start the service. To start the service, open a command prompt and type: Copy Codenet start aspstate What you'll see is: Figure 1. Starting the Windows NT service ASPState at the comm..