Unable to resolve service for type while attempting to activate

Question

I have one file Repository.cs that contains an interface and its implementation like so:

public interface IRepository

{
    IEnumerable

        

Answer 1

You need to register IRepository with the Dependency Injection framework. For example, in ConfigureServices, add the following:

services.AddScoped<IRepository, MemoryRepository>();

AddScoped is just one example of a service lifetime. Note that:

Scoped lifetime services are created once per request.

See the docs for more information on Dependency Injection in ASP.NET Core.