Как сериализовать и десериализовать объекты классов?

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Drawing;
 
namespace PetriNet_v1
{
    class Pozition : Element 
    {
        public List<Tranzition> incomingTranzitions;
        public List<Tranzition> outcomingTranzitions;
        public int CountChips = 0;
        public Pozition()
        {
            incomingTranzitions = new List<Tranzition>();
            outcomingTranzitions = new List<Tranzition>();
        }
        public Pozition(int left, int top)
        {
            location.X = left;
            location.Y = top;
            incomingTranzitions = new List<Tranzition>();
            outcomingTranzitions = new List<Tranzition>();
        }
        public void AddIncomingTranzition(Tranzition value, bool recursive)
        {
            incomingTranzitions.Add(value);
            if (recursive)
                value.AddOutcomingPozition(this, false);
        }
        public void AddOutcomingTranzition(Tranzition value, bool recursive)
        {
            outcomingTranzitions.Add(value);
            if (recursive)
                value.AddIncomingPozition(this, false);
        }
        public override void Paint(PictureBox PB)
        {
            Graphics gr = PB.CreateGraphics();
            gr.CompositingQuality = System.Drawing.Drawing2D.CompositingQuality.HighQuality;
            gr.CompositingMode = System.Drawing.Drawing2D.CompositingMode.SourceOver;
            gr.FillEllipse(Brushes.WhiteSmoke, location.X, location.Y, WIDTH, HEIGTH);
            Font font = new Font("Arial", 13);
            gr.DrawString(name, font, new SolidBrush(Color.FromArgb(100, 100, 100)), new PointF(location.X + 15, location.Y - 20));
            font.Dispose();
            font = new Font("Arial", 15);
            gr.DrawString(CountChips.ToString(), font, new SolidBrush(Color.FromArgb(100, 100, 100)), new PointF(location.X + (WIDTH - gr.MeasureString(CountChips.ToString(), font).Width) / 2, location.Y + (HEIGTH - gr.MeasureString(CountChips.ToString(), font).Height) / 2));
            font.Dispose();
            gr.Dispose();
        }
    }
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Drawing;
using System.Drawing.Drawing2D;
 
namespace PetriNet_v1
{
    class Tranzition : Element 
    {
        public List<Pozition> incomingPozitions;
        public List<Pozition> outcomingPozitions;
        public int Xred =0, Yred=0;
        Color color;
        public Tranzition()
        {
            incomingPozitions = new List<Pozition>();
            outcomingPozitions = new List<Pozition>();
        }
        public Tranzition(int left, int top)
        {
            location.X = left;
            location.Y = top;
            incomingPozitions = new List<Pozition>();
            outcomingPozitions = new List<Pozition>();
        }
        public void AddIncomingPozition(Pozition value, bool recursive)
        {
           if (recursive)
                value.AddIncomingTranzition(this, false);
           incomingPozitions.Add(value);
        }      
        public void AddOutcomingPozition(Pozition value, bool recursive)
        {
            if (recursive)
                value.AddIncomingTranzition(this, false);
            outcomingPozitions.Add(value);
        }
        public override void Paint(PictureBox PB)
        {
            Graphics gr = PB.CreateGraphics();
            gr.CompositingQuality = System.Drawing.Drawing2D.CompositingQuality.HighQuality;
            gr.CompositingMode = CompositingMode.SourceOver;
            color = Color.Black;
            gr.DrawLine(new Pen(color, 5), new Point(location.X+WIDTH / 2, location.Y+HEIGTH), new Point(location.X+WIDTH / 2, location.Y));
            gr.DrawString(name, new Font("Arial", 12), new SolidBrush(Color.FromArgb(100, 100, 100)), new PointF(location.X - 7, location.Y - 20));
            Pen pen = new Pen(Color.Red, 3);
            pen.SetLineCap(LineCap.NoAnchor, LineCap.ArrowAnchor, DashCap.Triangle);
            foreach (Pozition p in incomingPozitions)
            {
                gr.DrawLine(pen,
                      new Point(p.location.X + Element.WIDTH / 2, p.location.Y + Element.HEIGTH / 2),
                      new Point(this.location.X + Element.WIDTH / 2, this.location.Y + Element.HEIGTH / 2));
            }
            pen.Color = Color.Blue;
            foreach (Pozition p in outcomingPozitions)
            {
                gr.DrawLine(pen,
                    new Point(this.location.X + Element.WIDTH / 2, this.location.Y + Element.HEIGTH / 2),
                    new Point(p.location.X + Element.WIDTH / 2, p.location.Y + Element.HEIGTH / 2));
            }
            
            pen.Dispose();
        }
    }
}