CustomerPage.cshtml (View)

for (int i = 0; i < ViewData["CustomerNameFromCode"].ToString().Distinct().Count(); i++) {
 // returns 6 for some reason
} 

DataContext.cs

public Customer GetCustomerData(string code)
        {
            var query = (from a in Customers
                         where a != null && a.Code == code
                         select a).FirstOrDefault();

            return query;
        }

IDataContext.cs (Interface)

public interface IDataContext
    {
        Customer GetCustomerData(string code);      
    }

MainPage.cs (Controller)

public IActionResult CustomerPage(string code)
        {
            try
            {
                var NameQuery = _context.GetCustomerData(code).Name;

                ViewData["CustomerNameFromCode"] = NameQuery;

                return View();
            }
            catch
            {
                return RedirectToAction("Login");
            }
        }