Add a deep-clone func to the network. We will end up using this for adding ctrl-z functionality.

EduNetworkBuilder/Network.cs

@@ -10,6 +10,9 @@ using System.IO;
 using System.Text.RegularExpressions;
 using System.ComponentModel;
 using System.Drawing.Imaging;
+using System.Runtime.Serialization;
+using System.Runtime.Serialization.Formatters.Binary;
+
 
 
 namespace EduNetworkBuilder
@@ -17,6 +20,7 @@ namespace EduNetworkBuilder
     /// <summary>
     /// This is a whole network.  LAN, WAN, Internet; everything combined
     /// </summary>
+    [Serializable]
     public class Network
     {
         public string PuzzleName = "";
@@ -150,6 +154,30 @@ namespace EduNetworkBuilder
             return newitem;
         }
 
+        //from: http://stackoverflow.com/questions/78536/cloning-objects-in-c
+        public static T DeepClone<T>(T source)
+        {
+            if (!typeof(T).IsSerializable)
+            {
+                throw new ArgumentException("The type must be serializable.", "source");
+            }
+
+            // Don't serialize a null object, simply return the default for that object
+            if (Object.ReferenceEquals(source, null))
+            {
+                return default(T);
+            }
+
+            IFormatter formatter = new BinaryFormatter();
+            Stream stream = new MemoryStream();
+            using (stream)
+            {
+                formatter.Serialize(stream, source);
+                stream.Seek(0, SeekOrigin.Begin);
+                return (T)formatter.Deserialize(stream);
+            }
+        }
+
         public void ClearComponents()
         {
             NetComponents.Clear();