using System;

using System.Collections.Generic;

​

public class Program

{

    public static void Main()

    {

        Dictionary<string, object> test = new Properties().With("ParentPGA", 1).With("ChildPGA", 1);

    }

    public class Properties

    {

        private Dictionary<string, object> _store = new ();

        public Properties With(string name, object value)

        {

            _store.Add(name, value);

            return this;

        }

        public static implicit operator Dictionary<string, object>(Properties p) => p._store;

    }

}