Code

    public class MyLink : DiagramLink
    {
	  public MyLink(Diagram diagram)
		: base(diagram)
	  {
	  }

	  public MyLink(Diagram diagram, MyNode src, MyNode dest)
		: base(diagram, src, dest)
	  {
	  }

	  public MyLink(MyLink prototype, MyNode src, MyNode dest)
		: base(prototype, src, dest)
	  {
	  }

	  public MyLink(MyLink prototype, Diagram diagram)
		: base(diagram)
	  {
	  }

	  protected override void LoadFrom(System.IO.BinaryReader reader, PersistContext context)
	  {
		base.LoadFrom(reader, context);
	  }

	  protected override void SaveTo(System.IO.BinaryWriter writer, PersistContext context)
	  {
		base.SaveTo(writer, context);
	  }
    }
 

Code

    public class MyNode:DiagramNode
    {
	  public MyNode(Diagram diagram)
		: base(diagram)
	  {
	  }

	  public MyNode(MyNode prototype)
		: base(prototype)
	  {
	  }

	  protected override void LoadFrom(System.IO.BinaryReader reader, PersistContext context)
	  {
		base.LoadFrom(reader, context);
	  }

	  protected override void SaveTo(System.IO.BinaryWriter writer, PersistContext context)
	  {
		base.SaveTo(writer, context);
	  }

	  public override void Draw(MindFusion.Drawing.IGraphics graphics, RenderOptions options)
	  {
		graphics.DrawRectangle(Pens.Black, Rectangle.Truncate(this.bounds));
	  }

	  public override void DrawShadow(MindFusion.Drawing.IGraphics graphics)
	  {

	  }
    }
 

Code

    public partial class Form1 : Form
    {
	  public Form1()
	  {
		InitializeComponent();

		Diagram.RegisterItemClass(typeof(MyNode), "MyNode", 1);
		Diagram.RegisterItemClass(typeof(MyLink), "MyLink", 1);
	  }

	  private void button1_Click(object sender, EventArgs e)
	  {
		MyNode node = new MyNode(diagram1);
		node.Bounds = new RectangleF(10, 10, 20, 10);
		diagram1.Nodes.Add(node);

		MyNode node2 = new MyNode(diagram1);
		node2.Bounds = new RectangleF(50, 10, 20, 10);
		diagram1.Nodes.Add(node2);

		MyLink link = new MyLink(diagram1, node, node2);
		diagram1.Links.Add(link);
	  }

	  private void button2_Click(object sender, EventArgs e)
	  {
		diagramView1.CopyToClipboard(false);
	  }

	  private void button3_Click(object sender, EventArgs e)
	  {
		diagramView1.PasteFromClipboard(0, 0);
	  }
    }