Unable to serialize the session state

Oct 11, 2012 visual-basic-dotnet

In 'StateServer' and 'SQLServer' mode, ASP.NET will serialize the session state objects, and as a result non-serializable objects or MarshalByRef objects are not permitted. The same restriction applies if similar serialization is done by the custom session state store in 'Custom' mode.

Ensure that your POCOs are decorated with the Serialisable attribute.