Hands-On Mobile Development with .NET Core

Implementing the repository pattern

Naturally, while talking about data stores, the foremost abundant pattern in development work is the repository pattern. In the context of local and remote data, we could create small repositories that implement the same exact repository interface and create a manager class to coordinate the repositories. 

Let's start with a transient data repository, such as Auctions. For the Auctions API, let's assume that we have three methods to retrieve:

• A list of auctions
• The details of a specific auction
• A method to update a specific auction

Let's define our interface for these methods:

public interface IAuctionsApi {    Task<IEnumerable<Auction>> GetAuctions();    Task<Auction> GetAuction(string auctionId); Task UpdateAuction(Auction ...