Creating an ActivePrinterProfile singleton and starting to move the code from PrinterCommunication into that.

ActivePrinterProfile.cs

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+using System;
+using System.Collections.Generic;
+using System.Globalization;
+using System.Diagnostics;
+using System.Text;
+using System.IO;
+
+using MatterHackers.Agg;
+using MatterHackers.Agg.UI;
+using MatterHackers.VectorMath;
+using MatterHackers.MatterControl.ContactForm;
+using MatterHackers.MatterControl.DataStorage;
+using MatterHackers.Localizations;
+
+namespace MatterHackers.MatterControl
+{
+    public class ActivePrinterProfile
+    {
+        static ActivePrinterProfile globalInstance = null;
+
+        // private so that it can only be gotten through the Instance
+        ActivePrinterProfile()
+        {
+        }
+
+        public Printer ActivePrinter { get; set; }
+
+        public static ActivePrinterProfile Instance
+        {
+            get
+            {
+                if (globalInstance == null)
+                {
+                    globalInstance = new ActivePrinterProfile();
+                }
+
+                return globalInstance;
+            }
+
+            set
+            {
+                if (globalInstance != value)
+                {
+                    PrinterCommunication.Instance.Disable();
+                    globalInstance = value;
+                    PrinterCommunication.Instance.OnActivePrinterChanged(null);
+                }
+            }
+        }
+    }
+}