lazy and cache

public static MyData GetMyDataFromDb() { ... }

Lazy<MyData> lazy = null;
lock(myStaticLock) {
        lazy = (Lazy<MyData>)Cache["myKey"];
        if (null == lazy) {
                lazy = new Lazy<MyData>(GetMyDataFromDb, LazyThreadSafetyMode.ExecutionAndPublication);
                Cache["myKey"] = lazy;
        }
}
// now we have an instance of Lazy<MyData> what so ever
MyData data = lazy.Value; // !!