diff --git a/samples/TestComponents/Simple.razor.cs b/samples/TestComponents/Simple.razor.cs
index c0f51c46..dcb031a5 100644
--- a/samples/TestComponents/Simple.razor.cs
+++ b/samples/TestComponents/Simple.razor.cs
@@ -14,7 +14,7 @@ protected override void OnInitialized()
 
             var node1 = NewNode(0, 0);
             var node2 = NewNode(300, 300);
-            node1.GetPort(PortAlignment.RIGHT).AddLink(node2.GetPort(PortAlignment.LEFT));
+            diagramManager.AddLink(node1.GetPort(PortAlignment.RIGHT), node2.GetPort(PortAlignment.LEFT));
             diagramManager.AddNode(node1);
             diagramManager.AddNode(node2);
         }
diff --git a/src/Blazor.Diagrams.Core/DiagramManager.cs b/src/Blazor.Diagrams.Core/DiagramManager.cs
index 0a1eb56b..6db4ab7c 100644
--- a/src/Blazor.Diagrams.Core/DiagramManager.cs
+++ b/src/Blazor.Diagrams.Core/DiagramManager.cs
@@ -22,6 +22,7 @@ public class DiagramManager
         public event Action<Node> NodeAdded;
         public event Action<Node> NodeRemoved;
         public event Action<Node, bool> NodeSelectionChanged;
+        public event Action<Link> LinkAdded;
 
         public DiagramManager()
         {
@@ -50,6 +51,15 @@ public void RemoveNode(Node node)
             }
         }
 
+        public Link AddLink(Port source, Port target)
+        {
+            var link = new Link(source, target);
+            source.AddLink(link);
+            target.AddLink(link);
+            LinkAdded?.Invoke(link);
+            return link;
+        }
+
         public void SelectNode(Node node)
         {
             if (SelectedNode == node)
diff --git a/src/Blazor.Diagrams.Core/Models/Port.cs b/src/Blazor.Diagrams.Core/Models/Port.cs
index 36b20704..99812ee9 100644
--- a/src/Blazor.Diagrams.Core/Models/Port.cs
+++ b/src/Blazor.Diagrams.Core/Models/Port.cs
@@ -1,9 +1,12 @@
 using System.Collections.Generic;
+using System.Collections.ObjectModel;
 
 namespace Blazor.Diagrams.Core.Models
 {
     public class Port : Model
     {
+        private List<Link> _links = new List<Link>(4);
+
         public Port(PortAlignment alignment = PortAlignment.BOTTOM, Point position = null, Size size = null)
         {
             Alignment = alignment;
@@ -23,22 +26,14 @@ public Port(string id, PortAlignment alignment = PortAlignment.BOTTOM, Point pos
         public Point Offset { get; set; }
         public Point Position { get; set; }
         public Size Size { get; set; }
-        public List<Link> Links { get; } = new List<Link>();
-
-        public Link AddLink(Port targetPort)
-        {
-            var link = new Link(this, targetPort);
-            AddLink(link);
-            targetPort.AddLink(link);
-            return link;
-        }
-
-        internal void AddLink(Link link) => Links.Add(link);
+        public ReadOnlyCollection<Link> Links => _links.AsReadOnly();
 
         public void RefreshAll()
         {
             Refresh();
-            Links.ForEach(l => l.Refresh());
+            _links.ForEach(l => l.Refresh());
         }
+
+        internal void AddLink(Link link) => _links.Add(link);
     }
 }