public void InitContext() { var optionsBuilder = new DbContextOptionsBuilder <AccountDb>(); optionsBuilder.UseInMemoryDatabase(); var context = new AccountDb(optionsBuilder.Options); var accounts = Enumerable.Range(1, 10) .Select(i => new Account { Id = i, First = $"Bob{i}", Last = "Test", Email = "*****@*****.**" }); context.AddRange(accounts); int changed = context.SaveChanges(); _accountContext = context; }