public IHttpActionResult GetCartDetail()
 {
     if (ShoppingData.CartsList().Any())
     {
         return(Ok(ShoppingData.CartsList()));
     }
     else
     {
         return(NotFound());
     }
 }
 public IHttpActionResult GetOrderDetails(int OrderID)
 {
     if (ShoppingData.CartsList().Any(c => c.C_OrderID == OrderID))
     {
         return(Ok(ShoppingData.CartsList().Where(c => c.C_OrderID == OrderID).ToList()));
     }
     else
     {
         return(NotFound());
     }
 }