void InsertSessionItem (InProcSessionItem item, int timeout, string id)
{
if (item == null || String.IsNullOrEmpty (id))
return;
HttpRuntime.InternalCache.Insert (id,
item,
null,
Cache.NoAbsoluteExpiration,
TimeSpan.FromMinutes (timeout),
CacheItemPriority.AboveNormal,
removedCB);
}