Friday, November 22, 2019

ASP.NET SessionState error: Provider must implement the class 'System.Web.SessionState.SessionStateStoreProviderBase'

After switching to the async SQL Session State Provider one of our projects failed to run. Instead we got a yellow-screen-of-death with the following message:

Provider must implement the class 'System.Web.SessionState.SessionStateStoreProviderBase'

I had to take one extra manual step to get the async provider up and running. I had to replace the default session state module by an async alternative: