SQLCLR : Table Valued Function

using System;
using Microsoft.SqlServer.Server;
using System.Collections;
using System.Data.SqlTypes;
using System.Collections.Generic;

class Product
{
    public int Quantity { get; set; }
    public string Description { get; set; }
}


public partial class UserDefinedFunctions
{
    
    [SqlFunction(TableDefinition = @"Quantity int,
                                     Description nvarchar(100)", 
                            Name = "Products", 
               FillRowMethodName = "FillRowProduct")]
    public static IEnumerable GetProducts()
    {
        
        List lstPerson = new List();
        lstPerson.Add(new Product { Quantity = 1, Description = "Ball" });
        lstPerson.Add(new Product { Quantity = 10, Description = "Bike" });
        lstPerson.Add(new Product { Quantity = 5, Description = "Club" });
        lstPerson.Add(new Product { Quantity = 10, Description = "Bat" });
        return lstPerson;
    }

 
    public static void FillRowProduct(Object obj, out SqlInt32 Quantity, out SqlChars Description)
    {
        Product p = (Product)obj;
        Description = new SqlChars(p.Description);
        Quantity = new SqlInt32(p.Quantity);
    }
};

<--->
SELECT Prod.*
FROM dbo.Products() AS Prod

Quantity Description
1    Ball
10    Bike
5    Club
10    Bat