Version 4: Upgrade to VS 2017

MapControl/Shared/Tile.cs

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+// XAML Map Control - https://github.com/ClemensFischer/XAML-Map-Control
+// © 2017 Clemens Fischer
+// Licensed under the Microsoft Public License (Ms-PL)
+
+using System;
+#if WINDOWS_UWP
+using Windows.UI.Xaml.Controls;
+#else
+using System.Windows.Controls;
+#endif
+
+namespace MapControl
+{
+    public partial class Tile
+    {
+        public static TimeSpan FadeDuration { get; set; } = TimeSpan.FromSeconds(0.1);
+
+        public readonly int ZoomLevel;
+        public readonly int X;
+        public readonly int Y;
+        public readonly Image Image = new Image { Opacity = 0d };
+
+        public Tile(int zoomLevel, int x, int y)
+        {
+            ZoomLevel = zoomLevel;
+            X = x;
+            Y = y;
+        }
+
+        public bool Pending { get; set; } = true;
+
+        public int XIndex
+        {
+            get
+            {
+                var numTiles = 1 << ZoomLevel;
+                return ((X % numTiles) + numTiles) % numTiles;
+            }
+        }
+    }
+}