DictionaryCache.cs

public class DictionaryCache<TObject>
{
    // hide the constructor
    private DictionaryCache() { }

    public static Dictionary<string, TObject> Cache
    {
        get
        {
            return Session[CacheType.Name] as Dictionary<string, TObject>;
        }

        set
        {
            Session[CacheType.Name] = value;
        }
    }

    private static Type CacheType { get { return typeof(TObject); } }
    private static HttpSessionState Session { get { return HttpContext.Current.Session; } }
}