If my interface must return Task what is the best way to have a no-operation implementation?

Question

In the code below, due to the interface, the class LazyBar must return a task from its method (and for argument\'s sake can\'t be changed). If LazyBar

Answer 1

If you are using generics, all answer will give us compile error. You can use return default(T);. Sample below to explain further.

public async Task GetItemAsync(string id)
            {
                try
                {
                    var response = await this._container.ReadItemAsync(id, new PartitionKey(id));
                    return response.Resource;
                }
                catch (CosmosException ex) when (ex.StatusCode == System.Net.HttpStatusCode.NotFound)
                {

                    return default(T);
                }

            }