diff --git a/MonoStockPortfolio/Activites/PortfolioActivity.cs b/MonoStockPortfolio/Activites/PortfolioActivity.cs
index d8fa02f..8059a61 100644
--- a/MonoStockPortfolio/Activites/PortfolioActivity.cs
+++ b/MonoStockPortfolio/Activites/PortfolioActivity.cs
@@ -1,7 +1,6 @@
 using System;
 using System.Collections.Generic;
 using System.Linq;
-using System.Threading;
 using Android.App;
 using Android.Content;
 using Android.OS;
@@ -90,41 +89,40 @@ namespace MonoStockPortfolio.Activites
 
         private void Refresh()
         {
-            var pd = new ProgressDialog(this);
-            pd.SetMessage("Loading...Please wait...");
-            pd.SetProgressStyle(ProgressDialogStyle.Spinner);
-            pd.Show();
+            RefreshWorker();
 
-            Action refresh = () =>
-                                 {
-                                     var tickers = _svc.GetDetailedItems(ThisPortofolioId, GetStockItemsFromConfig());
-                                     if (tickers.Any())
-                                     {
-                                         RunOnUiThread(() => RefreshUI(tickers));
-                                     }
-                                     else
-                                     {
-                                         RunOnUiThread(() => ShowMessage("Please add positions!"));
-                                     }
-                                     RunOnUiThread(pd.Dismiss);
-                                 };
-            var background = new Thread(() => refresh());
-            background.Start();
             UpdateHeader(GetStockItemsFromConfig());
         }
 
-        private void ShowMessage(string message)
+        [OnWorkerThread]
+        private void RefreshWorker()
         {
-            var listAdapter = new ArrayAdapter<string>(this, Android.Resource.Layout.SimpleListItem1, new[] { message });
-            QuoteListview.Adapter = listAdapter;
+            var tickers = _svc.GetDetailedItems(ThisPortofolioId, GetStockItemsFromConfig());
+            if (tickers.Any())
+            {
+                RefreshUI(tickers);
+            }
+            else
+            {
+                ShowMessage("Please add positions!");
+            }
         }
 
+        [OnGuiThread]
         private void RefreshUI(IEnumerable<PositionResultsViewModel> tickers)
         {
             var listAdapter = new PositionArrayAdapter(this, tickers.ToArray());
             QuoteListview.Adapter = listAdapter;
         }
 
+        [OnGuiThread]
+        private void ShowMessage(string message)
+        {
+            var listAdapter = new ArrayAdapter<string>(this, Android.Resource.Layout.SimpleListItem1, new[] { message });
+            QuoteListview.Adapter = listAdapter;
+        }
+
+        [OnGuiThread]
         private void UpdateHeader(IEnumerable<StockDataItem> items)
         {
             QuoteListviewHeader.RemoveAllViews();
diff --git a/MonoStockPortfolio/Framework/OnGuiThreadAttribute.cs b/MonoStockPortfolio/Framework/OnGuiThreadAttribute.cs
new file mode 100644
index 0000000..9e635d3
--- /dev/null
+++ b/MonoStockPortfolio/Framework/OnGuiThreadAttribute.cs
@@ -0,0 +1,23 @@
+using Android.App;
+using Android.Util;
+using PostSharp.Aspects;
+
+namespace MonoStockPortfolio.Framework
+{
+    public class OnGuiThreadAttribute : MethodInterceptionAspect
+    {
+        public override void OnInvoke(MethodInterceptionArgs args)
+        {
+            var activity = args.Instance as Activity;
+            if (activity == null)
+            {
+                Log.Error("OnGuiThreadAttribute", "OnGuiThreadAttribute can only be used on methods within an Activity");
+                args.Proceed();
+            }
+            else
+            {
+                activity.RunOnUiThread(args.Proceed);
+            }
+        }
+    }
+}
\ No newline at end of file
diff --git a/MonoStockPortfolio/Framework/OnWorkerThreadAttribute.cs b/MonoStockPortfolio/Framework/OnWorkerThreadAttribute.cs
new file mode 100644
index 0000000..df307e3
--- /dev/null
+++ b/MonoStockPortfolio/Framework/OnWorkerThreadAttribute.cs
@@ -0,0 +1,42 @@
+using System;
+using System.Threading;
+using Android.App;
+using PostSharp.Aspects;
+
+namespace MonoStockPortfolio.Framework
+{
+    public class OnWorkerThreadAttribute : MethodInterceptionAspect
+    {
+        private ProgressDialog _progressDialog;
+
+        public override void OnInvoke(MethodInterceptionArgs args)
+        {
+            var activity = args.Instance as Activity;
+            if(activity == null) throw new Exception("OnWorkerThread can only be used on methods in Activity classes");
+
+            ShowProgressDialog(activity);
+            ThreadPool.QueueUserWorkItem(delegate
+                                             {
+                                                 args.Proceed();
+                                                 activity.RunOnUiThread(DismissProgressDialog);
+                                             });
+        }
+
+        private void ShowProgressDialog(Activity activity)
+        {
+            if (_progressDialog == null)
+            {
+                var pd = new ProgressDialog(activity);
+                pd.SetMessage("Loading...Please wait...");
+                pd.SetProgressStyle(ProgressDialogStyle.Spinner);
+                _progressDialog = pd;
+            }
+            _progressDialog.Show();
+        }
+
+        private void DismissProgressDialog()
+        {
+            _progressDialog.Dismiss();
+        }
+    }
+}
\ No newline at end of file
diff --git a/MonoStockPortfolio/MonoStockPortfolio.csproj b/MonoStockPortfolio/MonoStockPortfolio.csproj
index e7a37e3..bfee43a 100644
--- a/MonoStockPortfolio/MonoStockPortfolio.csproj
+++ b/MonoStockPortfolio/MonoStockPortfolio.csproj
@@ -70,6 +70,8 @@
     </Compile>
     <Compile Include="Framework\IoCAttribute.cs" />
     <Compile Include="Framework\IttyBittyIoC.cs" />
+    <Compile Include="Framework\OnGuiThreadAttribute.cs" />
+    <Compile Include="Framework\OnWorkerThreadAttribute.cs" />
     <Compile Include="Framework\ServiceLocator.cs" />
     <Compile Include="Resources\Resource.Designer.cs" />
     <Compile Include="Properties\AssemblyInfo.cs" />