Caching

ICacheService

public interface ICacheService
{
    T Get<T>(string cacheID, Func<T> getItemCallback) where T : class;
}

InMemoryCache

public class InMemoryCache:ICacheService
{
    public T Get<T>(string cacheID, Func<T> getItemCallback) where T : class
    {
        T item = HttpRuntime.Cache.Get(cacheID) as T;
        if (item == null)
        {
            item = getItemCallback();
            HttpRuntime.Cache.Insert(
                cacheID, item, null, DateTime.Now.AddHours(1d), System.Web.Caching.Cache.NoSlidingExpiration);
        }

        return item;
    }
}