Hi  AliYilmaz,
To fix this error creating a class and return strongly type model instead of anonymous object.
Refer below example.
Database
For this example I have used of Northwind database that you can download using the link given below.
Download Northwind Database
Model
public class Customer
{
    public string CustomerID { get; set; }
    public string ContactName { get; set; }
    public string City { get; set; }
    public string Country { get; set; }
}
Controller
public class HomeController : Controller
{
    private DBCtx Context { get; }
    public HomeController(DBCtx _context)
    {
        this.Context = _context;
    }
    public IActionResult Index()
    {
        var res = (from customer in this.Context.Customers.Take(5)
                    select new CustomerModel { Name = customer.ContactName }).ToList();
        ViewBag.Artikel = res;
        return View();
    }
    public class CustomerModel
    {
        public string Name { get; set; }
    }
}
View
@{
    Layout = null;
}
<!DOCTYPE html>
<html>
<head>
    <meta name="viewport" content="width=device-width" />
    <title>Index</title>
</head>
<body>
    @foreach (var item in ViewBag.Artikel)
    {
        @item.Name
        <br />
    }
</body>
</html>
Output
Maria Anders
Ana Trujillo
Antonio Moreno
Thomas Hardy
Christina Berglund