From e37068838adf7726dcb9ea0c09e89e588b275e31 Mon Sep 17 00:00:00 2001
From: Antony Male <antony.male@gmail.com>
Date: Sun, 23 Feb 2014 20:05:56 +0000
Subject: [PATCH] Execute runs delegate synchronously if possible

---
 Stylet/Execute.cs | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/Stylet/Execute.cs b/Stylet/Execute.cs
index 0a7f059..75fb0f4 100644
--- a/Stylet/Execute.cs
+++ b/Stylet/Execute.cs
@@ -13,7 +13,8 @@ namespace Stylet
 
         public static void OnUIThread(Action action)
         {
-            if (SynchronizationContext != null)
+            // If we're already on the given SynchronizationContext, or it hasn't been set, run synchronously
+            if (SynchronizationContext != null && SynchronizationContext != SynchronizationContext.Current)
                 SynchronizationContext.Post(_ => action(), null);
             else
                 action();
@@ -21,7 +22,8 @@ namespace Stylet
 
         public static Task OnUIThreadAsync(Action action)
         {
-            if (SynchronizationContext != null)
+            // If we're already on the given SynchronizationContext, or it hasn't been set, run synchronously
+            if (SynchronizationContext != null && SynchronizationContext != SynchronizationContext.Current)
             {
                 var tcs = new TaskCompletionSource<object>();
                 SynchronizationContext.Post(_ =>