Simple cache provider

Instead of using the if condition to take the data from the or from the db on each data function, i have created a simple function that uses delegate and generics,
the function improve your code concentration and פrevents code replication
the function has 3 arguments:
- cacheKey - the key name to use in the cache object
- getfromDbFunc - this function will call in case that the cache is empty
- param - the parameter will be send to getfromDbFunc function

public class CacheProvider
{
    public T GetData<T, P>(string cacheKey, 
        Func<P, T> getfromDbFunc, object param) where T : class
    {
        T item = HttpRuntime.Cache.Get(cacheKey) as T;
        P p = (P)param;
        if (item == null)
        {
            item = getfromDbFunc(p);
            HttpContext.Current.Cache.Insert(cacheKey, item, null,
                DateTime.UtcNow.AddMinutes(10),
                System.Web.Caching.Cache.NoSlidingExpiration);
        }
        return item;
    }
}

Example how to use:

 protected void Page_Load(object sender, EventArgs e)
    {
        CacheProvider cacheProvider = new CacheProvider();
        int userid = 17;
        var user = cacheProvider.GetData<string, int>("user_" + userid, getUser, userid);
    }
    public string getUser(int id)
    {
        //TODO: retrieve user from db
        return "newuser";
    }

I'll be glad to get suggestions or improvements