ERROR CS0121 ( The call is ambiguous between the following methods or properties: clase1utilidades

I have the following code to check if the current session has items in the shopping cart. I get the error in below line and it repeats itself in every statement.

ERROR CS0121 ( The call is ambiguous between the following methods or properties: clase1utilidades

 if (HttpContext.Session.Get<IEnumerable<CarroComprasM>>(WC.SessionCarroCompras) != null &&
    HttpContext.Session.Get<IEnumerable<CarroComprasM>>(WC.SessionCarroCompras).Count() > 0)

public IActionResult Index()
{
    List<CarroComprasM> CarroComprasList = new List<CarroComprasM>();
    IEnumerable<CarroComprasM> element = HttpContext.Session.Get<IEnumerable<CarroComprasM>>(WC.SessionCarroCompras);
    if (HttpContext.Session.Get<IEnumerable<CarroComprasM>>(WC.SessionCarroCompras) != null &&
        HttpContext.Session.Get<IEnumerable<CarroComprasM>>(WC.SessionCarroCompras).Count() > 0)
    {
        CarroComprasList = HttpContext.Session.Get<List<CarroComprasM>>(WC.SessionCarroCompras);
    }

    List<int> producEnCarro = CarroComprasList.Select(i => i.ProductoId).ToList();
    IEnumerable<Producto> proList = _db.Producto.Where(p => producEnCarro.Contains(p.Id));
    
    return View(proList);
}