Usage: cacheProvider.Get("cache id", (delegate method if cache is empty)); Cache provider will check if there's anything by the name of "cache id" in the cache, and if there's not, it will call a delegate method to fetch data and store it in cache. Example: var products=cacheService.Get("catalog.products", ()=>productRepository.GetAll())

InMemoryCache.cs

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();
            HttpContext.Current.Cache.Insert(cacheID,item);
        }
        return item;
    }
}

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