diff --git a/MapControl/Shared/BingMapsTileLayer.cs b/MapControl/Shared/BingMapsTileLayer.cs
index a959fc09..e86c043f 100644
--- a/MapControl/Shared/BingMapsTileLayer.cs
+++ b/MapControl/Shared/BingMapsTileLayer.cs
@@ -50,24 +50,25 @@ namespace MapControl
         {
             Loaded -= OnLoaded;
 
-            if (string.IsNullOrEmpty(ApiKey))
+            if (!string.IsNullOrEmpty(ApiKey))
             {
-                Debug.WriteLine("BingMapsTileLayer requires a Bing Maps API Key");
-                return;
-            }
+                var metadataUri = $"http://dev.virtualearth.net/REST/V1/Imagery/Metadata/{Mode}?output=xml&key={ApiKey}";
 
-            var metadataUri = $"http://dev.virtualearth.net/REST/V1/Imagery/Metadata/{Mode}?output=xml&key={ApiKey}";
-
-            try
-            {
-                using (var stream = await ImageLoader.HttpClient.GetStreamAsync(metadataUri))
+                try
                 {
-                    ReadImageryMetadata(XDocument.Load(stream).Root);
+                    using (var stream = await ImageLoader.HttpClient.GetStreamAsync(metadataUri))
+                    {
+                        ReadImageryMetadata(XDocument.Load(stream).Root);
+                    }
+                }
+                catch (Exception ex)
+                {
+                    Debug.WriteLine("BingMapsTileLayer: {0}: {1}", metadataUri, ex.Message);
                 }
             }
-            catch (Exception ex)
+            else
             {
-                Debug.WriteLine("BingMapsTileLayer: {0}: {1}", metadataUri, ex.Message);
+                Debug.WriteLine("BingMapsTileLayer requires a Bing Maps API Key");
             }
         }
 
diff --git a/MapControl/Shared/MapTileLayerBase.cs b/MapControl/Shared/MapTileLayerBase.cs
index 4302c47f..172ff119 100644
--- a/MapControl/Shared/MapTileLayerBase.cs
+++ b/MapControl/Shared/MapTileLayerBase.cs
@@ -52,12 +52,7 @@ namespace MapControl
 
         private MapBase parentMap;
 
-        public MapTileLayerBase()
-            : this(new TileImageLoader())
-        {
-        }
-
-        public MapTileLayerBase(ITileImageLoader tileImageLoader)
+        protected MapTileLayerBase(ITileImageLoader tileImageLoader)
         {
             IsHitTestVisible = false;
             RenderTransform = new MatrixTransform();