diff -r 21504f47aedf -r 96263190189a Hardware/Hardware.cs
--- a/Hardware/Hardware.cs	Sat Jun 04 13:27:11 2011 +0000
+++ b/Hardware/Hardware.cs	Sun Jun 19 12:41:18 2011 +0000
@@ -113,6 +113,13 @@
 
     public abstract void Update();
 
+    public event HardwareEventHandler Closing;
+
+    public virtual void Close() {
+      if (Closing != null)
+        Closing(this);
+    }
+
     public void Accept(IVisitor visitor) {
       if (visitor == null)
         throw new ArgumentNullException("visitor");