Is anyone using Caching (HttpRuntime.Cache) in Whidbey? Not sure if there's
another newsgroup for this though since it's still beta....

I'm having issues running a system built on 1.1 in a 2.0 environment...
Simple (I think!!) use of the Cache as below,

if (HttpRuntime.Cache[cacheKey] == null)
{
       HttpRuntime.Cache.Add(cacheKey, new
Hashtable(),null,DateTime.Now.AddMonths(1),TimeSpan.Zero,System.Web.Caching.CacheItemPriority.Normal,null);
}
userLookupTable = (Hashtable) HttpRuntime.Cache[cacheKey];
userKey = "User-" + username;
if (userLookupTable[userKey] != null)   //**
{
       return (User) userLookupTable[userKey];
}

And the system is crashing on the //** line with "Object reference not set
to an instance of an object.". I would've thought that the check in the
first line would capture if the Hashtable was null and instantiate it there!