private bool UpgradeOldProject() { if (DiagramViewModel.NeedsUpgrade) { var rect = new Rect(50f, 50f, 200f, 75f); GUI.Box(rect, string.Empty); GUILayout.BeginArea(rect); GUILayout.Label("You need to upgrade to the new " + Environment.NewLine + "file format for future compatability."); if (GUILayout.Button("Upgrade Now")) { DiagramViewModel.UpgradeProject(); return(true); } GUILayout.EndArea(); } return(false); }