How to turn on identity-insert in .net core

Question

I made a few tables in EF and entered in some seed data where I give value to a few columns with a primary key. When I run the application I am getting the error message: <

Answer 1

@Steve Nyholm answer is OK, But in .Net core 3 ExecuteSqlCommand is Obsolete, ExecuteSqlInterpolated replacement of ExecuteSqlCommand:

using (var db = new AppDbContext())
using (var transaction = db.Database.BeginTransaction())
{
    var user = new User {Id = 123, Name = "Joe"};
    db.Users.Add(user);
    db.Database.ExecuteSqlInterpolated($"SET IDENTITY_INSERT MyDB.Users ON;");
    db.SaveChanges();
    db.Database.ExecuteSqlInterpolated($"SET IDENTITY_INSERT MyDB.Users OFF");
    transaction.Commit();
}