ASP.NET Core 2.1 - IdentityUser Issue - Cannot create a DbSet for 'IdentityUser' this type is not included in the model for the context

Question

I have upgraded my code from ASP.NET Core 2.0 to Core 2.1. I created a new Core 2.1 project and moved my code into the new project. I have provided samples of my startup and

Answer 1

Try changing public partial class ApplicationDbContext : IdentityDbContext<ApplicationUser> to public partial class ApplicationDbContext : IdentityDbContext<IdentityUser>

Compiler will generate DbSet with the type provided to generic IdentityDbContext<TUser> class.

Answer 2

Change the ApplicationDbContext to:

private static bool _Created = false;

public ApplicationDbContext()
{
    if (!_Created)
    {
        _Created = true;
        Database.EnsureCreated();

    }
}

protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
{
    optionsBuilder.UseSqlServer(@"server = .\SQLSERVER; initial catalog = DBName; Integrated Security = True; MultipleActiveResultSets = True; App = EntityFramework & quot; ");
}

protected override void OnModelCreating(ModelBuilder builder)
{
    base.OnModelCreating(builder);
}

Answer 3

From Your startup.cs change

services.AddDefaultIdentity<IdentityUser>()

To

services.AddDefaultIdentity<ApplicationUser>()

Answer 4

As a follow up: to avoid the next possible issue as soon as this here is fixed: You also have to change the types in the Views\Shared_LoginPartial.cshtml

From

@inject SignInManager<IdentityUser> SignInManager
@inject UserManager<IdentityUser> UserManager

To

@inject SignInManager<ApplicationUser> SignInManager
@inject UserManager<ApplicationUser> UserManager