What are session state modes in ASP.NET?

Session State Modes uses WebForms to solve some problems like reliability and scalability. It can be stored on in different places and depending upon that, ASP.NET supports the following session state modes.

• InProc mode: This is the default mode in ASP.NET and it is stored in the web server memory.
• StateServer mode: This follows a process called the ASP.NET State Service. This is where the Session State is stored. When this app gets restarted, the Session State gets permanently stored or preserved on it.
• SQLServer mode: This stores the Session State on SQL Database. It gets preserved when the web app is restarted.
• Custom mode: The developer can set up/provide a customized storage provider.
• Off mode: This disables the Session State mode.