Cache wrapper for redis which will try get a value from the cache - if it doesn't exist it will perform the method you supply and set that as the cache value

redis-try-get-set

//cache
public async Task<T> TryGet<T>(string key, Func<Task<T>> ifCacheMissAction)
  {
    if (ifCacheMissAction == null) throw new ArgumentNullException("ifCacheMissAction");
    if (string.IsNullOrEmpty(key)) throw new ArgumentNullException("key");
    if (_isEnabled)
    {
        RedisValue redisValue = Cache.StringGet(key);
        // the following is a bit yolo
        if (redisValue.HasValue && redisValue != "{}")
        {
            return JsonConvert.DeserializeObject<T>(redisValue);
        }
    }
    T item = await ifCacheMissAction();
    SetValue(key, item);
    return item;
        }


//usage
public async Task<IEnumerable<AgendaItem>> Retrieve()
{
    const string resource = "program/agenda";
    const string cacheKey = "RetrieveAgenda";
    IEnumerable<AgendaItem> agendaItems = await _redisCache.TryGetList(cacheKey, async () =>
    {
        RestRequest restRequest = new RestRequest(resource, Method.GET);
        IEnumerable<AgendaItemDto> agendaItemDtos =
            await
                _integrationClient.ExecuteGetRequest<IEnumerable<AgendaItemDto>>(restRequest,
                    "There was an issue hitting the endpoint: {0}".FormatWith(resource));
        return AgendaMapper.MapMany(agendaItemDtos);
    });
    return agendaItems;
}