> What does these errors means ?
These error means that you are using the services through constructor Dependency Injection but you have not registered those services to DI resolver.
> What will be the correct configuration here ?
What you have done is the correct way to resolve services.
>What is the way to not to add n number of repository as service here?
You can extend the `IServiceCollection` as follows in a separate file.
public static class ServiceCollectionExtensions
{
public static IServiceCollection AddCustomServices(this IServiceCollection services,
IConfiguration configuration)
{
services.AddSingleton<IUnitOfWork, UnitOfWork>();
services.AddSingleton<IOrderRepository, OrderRepository>();
services.AddSingleton<ICustomerRepository, CustomerRepository>();
return services;
}
}
Then in the startup class as follows:
services.AddCustomServices(Configuration);
I was having a different problem, and yeah the parameterized constructor for my controlleror was already added with the correct interface. What I did was something straightforward. I just go to my `startup.cs` file, where I could see a call to register method.
public void ConfigureServices(IServiceCollection services)
{
services.Register();
}
In my case, this `Register` method was in a separate class `Injector`. So I had to add my newly introduced Interfaces there.
public static class Injector
{
public static void Register(this IServiceCollection services)
{
services.AddTransient<IUserService, UserService>();
services.AddTransient<IUserDataService, UserDataService>();
}
}
If you see, the parameter to this function is `this IServiceCollection`
Hope this helps.
