initial ctrl-z working

EduNetworkBuilder/Network.cs

@@ -45,6 +45,7 @@ namespace EduNetworkBuilder
         Image TheNetImage = new Bitmap(1024, 1024);
         Image TheNetImageBackground = new Bitmap(1024, 1024);
         public int itemsize = 100; //The size of network components
+        [NonSerialized]
         PictureBox myPBox = null;
         private int UniqueIdentifier = 100; //This gets used for all sorts of things.  is auto-incremented every time someone asks for one
         private List<Packet> myPackets = new List<Packet>();