diff --git a/MapControl/Shared/AutoEquirectangularProjection.cs b/MapControl/Shared/AutoEquirectangularProjection.cs
index c8898505..c4b36924 100644
--- a/MapControl/Shared/AutoEquirectangularProjection.cs
+++ b/MapControl/Shared/AutoEquirectangularProjection.cs
@@ -16,10 +16,9 @@ namespace MapControl
     {
         public const string DefaultCrsId = "AUTO2:42004";
 
-        public AutoEquirectangularProjection()
+        public AutoEquirectangularProjection() // parameterless constructor for XAML
             : this(DefaultCrsId)
         {
-            // XAML needs parameterless constructor
         }
 
         public AutoEquirectangularProjection(string crsId)
diff --git a/MapControl/Shared/AzimuthalEquidistantProjection.cs b/MapControl/Shared/AzimuthalEquidistantProjection.cs
index 0890accf..0cdf0ce6 100644
--- a/MapControl/Shared/AzimuthalEquidistantProjection.cs
+++ b/MapControl/Shared/AzimuthalEquidistantProjection.cs
@@ -15,10 +15,9 @@ namespace MapControl
     {
         public const string DefaultCrsId = "AUTO2:97003"; // proprietary CRS identifier
 
-        public AzimuthalEquidistantProjection()
+        public AzimuthalEquidistantProjection() // parameterless constructor for XAML
             : this(DefaultCrsId)
         {
-            // XAML needs parameterless constructor
         }
 
         public AzimuthalEquidistantProjection(string crsId)
diff --git a/MapControl/Shared/EquirectangularProjection.cs b/MapControl/Shared/EquirectangularProjection.cs
index 01cc075b..a35116e9 100644
--- a/MapControl/Shared/EquirectangularProjection.cs
+++ b/MapControl/Shared/EquirectangularProjection.cs
@@ -16,10 +16,9 @@ namespace MapControl
     {
         public const string DefaultCrsId = "EPSG:4326";
 
-        public EquirectangularProjection()
+        public EquirectangularProjection() // parameterless constructor for XAML
             : this(DefaultCrsId)
         {
-            // XAML needs parameterless constructor
         }
 
         public EquirectangularProjection(string crsId)
diff --git a/MapControl/Shared/GnomonicProjection.cs b/MapControl/Shared/GnomonicProjection.cs
index 8b1cdc7b..77323c8b 100644
--- a/MapControl/Shared/GnomonicProjection.cs
+++ b/MapControl/Shared/GnomonicProjection.cs
@@ -15,10 +15,9 @@ namespace MapControl
     {
         public const string DefaultCrsId = "AUTO2:97001"; // GeoServer non-standard CRS identifier
 
-        public GnomonicProjection()
+        public GnomonicProjection() // parameterless constructor for XAML
             : this(DefaultCrsId)
         {
-            // XAML needs parameterless constructor
         }
 
         public GnomonicProjection(string crsId)
diff --git a/MapControl/Shared/OrthographicProjection.cs b/MapControl/Shared/OrthographicProjection.cs
index 3ace6910..b4a1b7ea 100644
--- a/MapControl/Shared/OrthographicProjection.cs
+++ b/MapControl/Shared/OrthographicProjection.cs
@@ -15,10 +15,9 @@ namespace MapControl
     {
         public const string DefaultCrsId = "AUTO2:42003";
 
-        public OrthographicProjection()
+        public OrthographicProjection() // parameterless constructor for XAML
             : this(DefaultCrsId)
         {
-            // XAML needs parameterless constructor
         }
 
         public OrthographicProjection(string crsId)
diff --git a/MapControl/Shared/PolarStereographicProjection.cs b/MapControl/Shared/PolarStereographicProjection.cs
index 9770c4c8..c8c48db5 100644
--- a/MapControl/Shared/PolarStereographicProjection.cs
+++ b/MapControl/Shared/PolarStereographicProjection.cs
@@ -116,10 +116,9 @@ namespace MapControl
     {
         public const string DefaultCrsId = "EPSG:32661";
 
-        public UpsNorthProjection()
+        public UpsNorthProjection() // parameterless constructor for XAML
             : this(DefaultCrsId)
         {
-            // XAML needs parameterless constructor
         }
 
         public UpsNorthProjection(string crsId)
@@ -136,10 +135,9 @@ namespace MapControl
     {
         public const string DefaultCrsId = "EPSG:32761";
 
-        public UpsSouthProjection()
+        public UpsSouthProjection() // parameterless constructor for XAML
             : this(DefaultCrsId)
         {
-            // XAML needs parameterless constructor
         }
 
         public UpsSouthProjection(string crsId)
diff --git a/MapControl/Shared/StereographicProjection.cs b/MapControl/Shared/StereographicProjection.cs
index d00bfca9..48ffcc59 100644
--- a/MapControl/Shared/StereographicProjection.cs
+++ b/MapControl/Shared/StereographicProjection.cs
@@ -15,10 +15,9 @@ namespace MapControl
     {
         public const string DefaultCrsId = "AUTO2:97002"; // GeoServer non-standard CRS identifier
 
-        public StereographicProjection()
+        public StereographicProjection() // parameterless constructor for XAML
             : this(DefaultCrsId)
         {
-            // XAML needs parameterless constructor
         }
 
         public StereographicProjection(string crsId)
diff --git a/MapControl/Shared/WebMercatorProjection.cs b/MapControl/Shared/WebMercatorProjection.cs
index fe36ba89..29616819 100644
--- a/MapControl/Shared/WebMercatorProjection.cs
+++ b/MapControl/Shared/WebMercatorProjection.cs
@@ -15,10 +15,9 @@ namespace MapControl
     {
         public const string DefaultCrsId = "EPSG:3857";
 
-        public WebMercatorProjection()
+        public WebMercatorProjection() // parameterless constructor for XAML
             : this(DefaultCrsId)
         {
-            // XAML needs parameterless constructor
         }
 
         public WebMercatorProjection(string crsId)
diff --git a/MapControl/Shared/Wgs84AutoTmProjection.cs b/MapControl/Shared/Wgs84AutoTmProjection.cs
index ebf9039f..05b6dce7 100644
--- a/MapControl/Shared/Wgs84AutoTmProjection.cs
+++ b/MapControl/Shared/Wgs84AutoTmProjection.cs
@@ -7,10 +7,9 @@
     {
         public const string DefaultCrsId = "AUTO2:42002";
 
-        public Wgs84AutoTmProjection()
+        public Wgs84AutoTmProjection() // parameterless constructor for XAML
             : this(DefaultCrsId)
         {
-            // XAML needs parameterless constructor
         }
 
         public Wgs84AutoTmProjection(string crsId)
diff --git a/MapControl/Shared/Wgs84AutoUtmProjection.cs b/MapControl/Shared/Wgs84AutoUtmProjection.cs
index 0b1c42ef..7ca5f684 100644
--- a/MapControl/Shared/Wgs84AutoUtmProjection.cs
+++ b/MapControl/Shared/Wgs84AutoUtmProjection.cs
@@ -13,10 +13,9 @@ namespace MapControl
 
         private readonly string autoCrsId;
 
-        public Wgs84AutoUtmProjection()
+        public Wgs84AutoUtmProjection() // parameterless constructor for XAML
             : this(DefaultCrsId)
         {
-            // XAML needs parameterless constructor
         }
 
         public Wgs84AutoUtmProjection(string crsId)
diff --git a/MapControl/Shared/WorldMercatorProjection.cs b/MapControl/Shared/WorldMercatorProjection.cs
index 72abbbdf..6ecbda1a 100644
--- a/MapControl/Shared/WorldMercatorProjection.cs
+++ b/MapControl/Shared/WorldMercatorProjection.cs
@@ -17,10 +17,9 @@ namespace MapControl
 
         public const string DefaultCrsId = "EPSG:3395";
 
-        public WorldMercatorProjection()
+        public WorldMercatorProjection() // parameterless constructor for XAML
             : this(DefaultCrsId)
         {
-            // XAML needs parameterless constructor
         }
 
         public WorldMercatorProjection(string crsId)
diff --git a/MapProjections/Shared/Wgs84AutoUtmProjection.cs b/MapProjections/Shared/Wgs84AutoUtmProjection.cs
index edf53f4b..18c03ce1 100644
--- a/MapProjections/Shared/Wgs84AutoUtmProjection.cs
+++ b/MapProjections/Shared/Wgs84AutoUtmProjection.cs
@@ -11,10 +11,9 @@ namespace MapControl.Projections
     {
         private readonly string autoCrsId;
 
-        public Wgs84AutoUtmProjection()
+        public Wgs84AutoUtmProjection() // parameterless constructor for XAML
             : this(MapControl.Wgs84AutoUtmProjection.DefaultCrsId)
         {
-            // XAML needs parameterless constructor
         }
 
         public Wgs84AutoUtmProjection(string crsId)