Child record based on parent id using Linq in ASP.Net

I want to write the Customer belongs their product

Customer 1  and their details

then products details Purchased by Customer 1

Customer 2  and their details

then products details Purchased by Customer 2

    public class Customer
    {
        public int CustID { get; set; }
        public string CustName { get; set; }
        public string CustEmail { get; set; }
        public string CustContact { get; set; }
        public string CustAdd { get; set; }
        public IList<Product> product { get; set; }
    }
    public class Product
    {
        public int ProdID { get; set; }
        public string ProdName { get; set; }
        public Decimal ProdPrice { get; set; }
        public string ProdManufacturer { get; set; }
    }
    class Program
    {
        static void Main(string[] args)
        {
            IEnumerable<Customer> cust = new List<Customer>()
             {
                    new Customer
                    {
                       CustID=1,CustName="David",CustEmail="David@dav.com",CustContact="427899",CustAdd="New ZeaLand",
                    
                       product=new List<Product>
                       {
                          new Product { ProdID=1,ProdName="Electra",ProdPrice=709.90M,ProdManufacturer="Elec" },
                          new Product { ProdID=2,ProdName="Serials",ProdPrice=89.90M,ProdManufacturer="Foods" },
                       }
                   },
                   new Customer
                    {
                       CustID=2,CustName="Jhon",CustEmail="Jhon@dav.com",CustContact="327899",CustAdd="United kingdom London",
                    
                       product=new List<Product>
                       {
                          new Product { ProdID=1,ProdName="Electra",ProdPrice=689.90M,ProdManufacturer="Electrical" },
                          new Product{ ProdID=1,ProdName="Mech",ProdPrice=129.90M,ProdManufacturer="Mechanical" },
                       }
                
                   }
            };


        }
    }