I'm trying to use the System.Web.Caching.Cache in a non-web, non-HTTPContext
environment.  When I do this:

System.Web.Caching.Cache webCache = new System.Web.Caching.Cache(); 
int n = webCache.Count;

I get a null-reference exception on the 2nd line.  In the debugger it shows
that the webCache's _cacheInternal private member is <undefined value>. 
Therefore I can't add, count, get, remove, etc.

Any idea why I couldn't use this class in this way?

Pointer to interface?
.Net Versions
ANN: .NET 3.0 Final
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