private void timer1_Tick(object sender, EventArgs e) { timer1.Enabled = false; tvGac.LoadGac(); // StringCollection sc = new StringCollection(); List <Assembly> refs = _project.GetReferences(sc); if (sc.Count > 0) { MathNode.Log(sc); } foreach (Assembly a in refs) { tvGac.Nodes.Add(new TreeNodeAssembly(a)); } //add an empty node to make sure all nodes are visible tvGac.Nodes.Add(new TreeNodeDummy()); }