I got 1 parent property class and 3 child property class. Here is my example

Parent class

public class blcSalesParam 
{   
    public string selectFrom
    {
        get;
        set;
    }

    public string pageAction
    {
        get;
        set;
    }
}

Child class

public class blcDeliveryOrder 
{
    public int? DeliveryID
    {
        get;
        set;
    }

    public string DeliveryCode
    {
        get;
        set;
    }