public static T Get <T>(this IDistributedCache source, string key, TimeSpan time, Func <T> fetch) where T : class
{
if (source.Exists(key))
{
return(source.Get <T>(key));
}
var result = fetch();
if (result != null)
{
var stringToPersist = Newtonsoft.Json.JsonConvert.SerializeObject(result);
var data = Encoding.UTF8.GetBytes(stringToPersist);
var options = new DistributedCacheEntryOptions().SetSlidingExpiration(time);
source.Set(key, data, options);
}
return(result);
}