Registering an open Generic Service erroneously asks me for type arguments

Question

I have a Generic Repository which takes a Generic DbContext and a Generic Model,

The Code I have is just a basic Generic Repository like so;

public class DataRepo<T,M> : IDataRepo<T,M> where T:DbContext where M :class
{
    private readonly T _Context;
    private readonly M _Model;


    public DataRepo(T Context, M model)
    {
        _Context = Context;
        _Model = model;
    }
    public void Delete()
    {
       _Context.Remove(_Model);
    }

    public async Task<IEnumerable<T>> GetAll()
    {
        var results = await _Context.Set<T>().AsQueryable().AsNoTracking().ToListAsync();

        return results;
    }

    public T GetSingleByID(int ID)
    {
        return _Context.Find<T>(ID);            
    }

    public void InsertBulkItems(ICollection<M> dataModels)
    {
        _Context.AddRange(dataModels);
    }

    public void InsertSingleItem()
    {
        _Context.Add(_Model);
    }

    public void UpdateItem()
    {
        _Context.Update(_Model);
    }
}

when I try to register this Service in Startup.cs, the compiler asks me for type arguments when according to this link I shouldn't be getting this error?

services.AddScoped(typeof(IDataRepo<>), typeof(DataRepo<>));

The Error I get is this;

CS0305 Using the generic type 'IDataRepo' requires 2 type arguments

Could someone point me in the right direction with this please?

Answer 1

Because you have multiple generic arguments, you will need to include a comma in the generic arguments

services.AddScoped(typeof(IDataRepo<,>), typeof(DataRepo<,>));

to properly represent how many generic arguments are needed for the types involved