Session sharing between ASP and ASP.NET
The question comes back every so often, so I thought I'd post about it.
Almost all existing solutions are intrusive and need to modify the code of the ASP application, the ASP.NET
application or both. All solutions incur a performance cost as the data has to be marshaled between the COM world of ASP and the .NET world of ASP.NET
There are also a few commercial products, all in the $200 to $300 range:
And then, there is my own approach, which is the only one that I know of that requires no source code change anywhere (except a few very particular cases), but it’s just a proof of concept, nothing I would use in a production environment (we have no performance data): http://www.dotnetguru.org/articles/us/ASP2ASPNET/ASP2ASPNET.html
And a very similar attempt which may scale better: