diff --git a/SampleApps/WpfApplication/MainWindow.xaml.cs b/SampleApps/WpfApplication/MainWindow.xaml.cs
index 0f5c5ddc..0677b3d5 100644
--- a/SampleApps/WpfApplication/MainWindow.xaml.cs
+++ b/SampleApps/WpfApplication/MainWindow.xaml.cs
@@ -23,10 +23,10 @@ namespace SampleApplication
                 //TileImageLoader.Cache = new SQLiteCache(TileImageLoader.DefaultCacheFolder);
                 //TileImageLoader.Cache = null;
 
-                var apiKeyPath = Path.Combine(
+                var bingMapsApiKeyPath = Path.Combine(
                     Environment.GetFolderPath(Environment.SpecialFolder.CommonApplicationData), "MapControl", "BingMapsApiKey.txt");
 
-                BingMapsTileLayer.ApiKey = File.ReadAllText(apiKeyPath)?.Trim();
+                BingMapsTileLayer.ApiKey = File.ReadAllText(bingMapsApiKeyPath)?.Trim();
             }
             catch (Exception ex)
             {