How do I change the ILazyLoader implementation in Entity Framework Core 2.2?

Question

I created an ASP.NET Core 2.2 Application, in Startup.cs I have this:

services.AddEntityFrameworkSqlServer();
services.AddScoped<ILazyLoader, MyLazyLoader>();

services.AddDbContext<ModelContext>(builder =>
{
    builder.UseLazyLoadingProxies();
    builder.UseSqlServer(Configuration.GetConnectionString("DefaultConnection"));
    var options = builder.Options;
    services.AddSingleton(options);
});

But the lazyloader is not changed, what do I need to change do make this change?

Answer 1

Remove the first two lines

services.AddEntityFrameworkSqlServer();
services.AddScoped<ILazyLoader, MyLazyLoader>();

and setup the EFC related stuff inside AddDbContext builder action.

builder.UseSqlServer will do internally AddEntityFrameworkSqlServer() , and to replace the ILazyLoader service , use - well, ReplaceService method:

services.AddDbContext<ModelContext>(builder =>
{
    builder.ReplaceService<ILazyLoader, MyLazyLoader>();
    // ...
});