From 30900b6e00d69cc8b87e54f6fce030b8ee487a4b Mon Sep 17 00:00:00 2001
From: Steven Kirk <steven.kirk@tricycleinc.com>
Date: Tue, 2 Dec 2014 14:07:37 +0100
Subject: [PATCH] Prevent timer delegate being GCd.

---
 Windows/Perspex.Win32/Win32Platform.cs | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/Windows/Perspex.Win32/Win32Platform.cs b/Windows/Perspex.Win32/Win32Platform.cs
index 0ba4cb8589..34ea286e19 100644
--- a/Windows/Perspex.Win32/Win32Platform.cs
+++ b/Windows/Perspex.Win32/Win32Platform.cs
@@ -7,6 +7,7 @@
 namespace Perspex.Win32
 {
     using System;
+    using System.Collections.Generic;
     using System.Reactive.Disposables;
     using System.Threading;
     using System.Threading.Tasks;
@@ -21,6 +22,8 @@ namespace Perspex.Win32
     {
         private static Win32Platform instance = new Win32Platform();
 
+        private List<Delegate> delegates = new List<Delegate>();
+
         public static void Initialize()
         {
             var locator = Locator.CurrentMutable;
@@ -48,8 +51,12 @@ namespace Perspex.Win32
                 (uint)interval.TotalMilliseconds,
                 timerDelegate);
 
+            // Prevent timerDelegate being garbage collected.
+            this.delegates.Add(timerDelegate);
+
             return Disposable.Create(() =>
             {
+                this.delegates.Remove(timerDelegate);
                 UnmanagedMethods.KillTimer(IntPtr.Zero, handle);
             });
         }