ASP.NET Core 2 - Identity - DI errors with custom Roles

Question

I got this code in my Startup.cs:

 services.AddDbContext(options =>
            options.UseSqlServer(Configuration.GetConnecti         


        

Answer 1

You have to create the IServiceScope on your own.

To do this you have to replace

var roleManager = serviceProvider.GetService<RoleManager<ApplicationRole>>();

with

using (IServiceScope scope = app.ApplicationServices.CreateScope()) {
    RoleManager<IdentityRole> roleManager = scope.ServiceProvider.GetRequiredService<RoleManager<IdentityRole>>();

    // Seed database code goes here
}