added new map styles

Source/BingMapsRESTToolkit.csproj

@@ -41,6 +41,7 @@
   <ItemGroup>
     <Compile Include="Enums\AvoidType.cs" />
     <Compile Include="Enums\ConfidenceLevel.cs" />
+    <Compile Include="Enums\ImageResolutionType.cs" />
     <Compile Include="Enums\ImageFormatType.cs" />
     <Compile Include="Enums\ImageryType.cs" />
     <Compile Include="Enums\RouteAttributeType.cs" />

Source/Enums/ImageResolutionType.cs

@@ -0,0 +1,18 @@
+namespace BingMapsRESTToolkit
+{
+    /// <summary>
+    /// An enumeration for image resolution.
+    /// </summary>
+    public enum ImageResolutionType
+    {
+        /// <summary>
+        /// The default resolution.
+        /// </summary>
+        Default,
+
+        /// <summary>
+        /// High DPI resolution.
+        /// </summary>
+        High
+    }
+}

Source/Enums/ImageryType.cs

@@ -50,10 +50,30 @@ namespace BingMapsRESTToolkit
         BirdseyeWithLabels,
 
         /// <summary>
-        /// Roads without additional imagery.
+        /// A dark version of the road maps.
+        /// </summary>
+        CanvasDark,
+
+        /// <summary>
+        /// A lighter version of the road maps which also has some of the details such as hill shading disabled.
+        /// </summary>
+		CanvasLight,
+
+        /// <summary>
+        /// A grayscale version of the road maps.
+        /// </summary>
+		CanvasGray,
+
+        /// <summary>
+        /// Roads without additional imagery. Uses legacy static tile service.
         /// </summary>
         Road,
 
+        /// <summary>
+        /// Roads without additional imagery. Uses dynamic tile service.
+        /// </summary>
+        RoadOnDemand,
+
         /// <summary>
         /// Ordnance Survey imagery.
         /// </summary>

Source/Requests/ImageryRequest.cs

@@ -191,6 +191,11 @@ namespace BingMapsRESTToolkit
         /// </summary>
         public RouteOptions RouteOptions { get; set; }
 
+        /// <summary>
+        /// Specifies the resolution of the labels on the image to retrieve.
+        /// </summary>
+        public ImageResolutionType Resolution { get; set; }
+
         #endregion
 
         #region Public Methods
@@ -282,6 +287,11 @@ namespace BingMapsRESTToolkit
                 sb.Append("&he=1");
             }
 
+            if(Resolution == ImageResolutionType.High)
+            {
+                sb.Append("&dpi=Large");
+            }
+
             //Routing Parameters
 
             if (isRoute)