Index: Core/Components/src/Core.Components.DotSpatial/Converter/MapPolygonDataConverter.cs
===================================================================
diff -u -r67284323e2785c651633d9c52049ba12a9c70e6a -r7aa6b8425147795b1a87b552fe9d82ae5e9c7565
--- Core/Components/src/Core.Components.DotSpatial/Converter/MapPolygonDataConverter.cs	(.../MapPolygonDataConverter.cs)	(revision 67284323e2785c651633d9c52049ba12a9c70e6a)
+++ Core/Components/src/Core.Components.DotSpatial/Converter/MapPolygonDataConverter.cs	(.../MapPolygonDataConverter.cs)	(revision 7aa6b8425147795b1a87b552fe9d82ae5e9c7565)
@@ -64,9 +64,7 @@
 
         protected override IFeatureSymbolizer CreateSymbolizer(MapPolygonData mapData)
         {
-            return mapData.Style != null
-                       ? new PolygonSymbolizer(mapData.Style.FillColor, mapData.Style.StrokeColor, mapData.Style.Width)
-                       : new PolygonSymbolizer();
+            return new PolygonSymbolizer(mapData.Style.FillColor, mapData.Style.StrokeColor, mapData.Style.Width);
         }
 
         private static IBasicGeometry GetGeometry(List<IPolygon> geometryList)
Index: Core/Components/src/Core.Components.Gis/Data/MapLineData.cs
===================================================================
diff -u -r31fd11e38313a3c1ee9bb0aa28ce7cdc49f749b2 -r7aa6b8425147795b1a87b552fe9d82ae5e9c7565
--- Core/Components/src/Core.Components.Gis/Data/MapLineData.cs	(.../MapLineData.cs)	(revision 31fd11e38313a3c1ee9bb0aa28ce7cdc49f749b2)
+++ Core/Components/src/Core.Components.Gis/Data/MapLineData.cs	(.../MapLineData.cs)	(revision 7aa6b8425147795b1a87b552fe9d82ae5e9c7565)
@@ -47,7 +47,7 @@
         /// Creates a new instance of <see cref="MapLineData"/> with default styling.
         /// </summary>
         /// <param name="name">The name of the <see cref="MapLineData"/>.</param>
-        /// <param name="style"></param>
+        /// <param name="style">The style of the data.</param>
         /// <exception cref="ArgumentException">Thrown when <paramref name="name"/> is 
         /// <c>null</c> or only whitespace.</exception>
         /// <exception cref="ArgumentNullException">Thrown when <paramref name="style"/>
Index: Core/Components/src/Core.Components.Gis/Data/MapPointData.cs
===================================================================
diff -u -r31fd11e38313a3c1ee9bb0aa28ce7cdc49f749b2 -r7aa6b8425147795b1a87b552fe9d82ae5e9c7565
--- Core/Components/src/Core.Components.Gis/Data/MapPointData.cs	(.../MapPointData.cs)	(revision 31fd11e38313a3c1ee9bb0aa28ce7cdc49f749b2)
+++ Core/Components/src/Core.Components.Gis/Data/MapPointData.cs	(.../MapPointData.cs)	(revision 7aa6b8425147795b1a87b552fe9d82ae5e9c7565)
@@ -46,7 +46,7 @@
         /// Creates a new instance of <see cref="MapPointData"/>.
         /// </summary>
         /// <param name="name">The name of the <see cref="MapPointData"/>.</param>
-        /// <param name="style"></param>
+        /// <param name="style">The style of the data.</param>
         /// <exception cref="ArgumentException">Thrown when <paramref name="name"/> is 
         /// <c>null</c> or only whitespace.</exception>
         /// <exception cref="ArgumentNullException">Thrown when <paramref name="style"/>
Index: Core/Components/src/Core.Components.Gis/Data/MapPolygonData.cs
===================================================================
diff -u -r67284323e2785c651633d9c52049ba12a9c70e6a -r7aa6b8425147795b1a87b552fe9d82ae5e9c7565
--- Core/Components/src/Core.Components.Gis/Data/MapPolygonData.cs	(.../MapPolygonData.cs)	(revision 67284323e2785c651633d9c52049ba12a9c70e6a)
+++ Core/Components/src/Core.Components.Gis/Data/MapPolygonData.cs	(.../MapPolygonData.cs)	(revision 7aa6b8425147795b1a87b552fe9d82ae5e9c7565)
@@ -21,6 +21,7 @@
 
 using System;
 using System.Collections.Generic;
+using System.Drawing;
 using System.Linq;
 using Core.Components.Gis.Features;
 using Core.Components.Gis.Style;
@@ -33,17 +34,36 @@
     public class MapPolygonData : FeatureBasedMapData
     {
         /// <summary>
+        /// Creates a new instance of <see cref="MapPolygonData"/> with default styling.
+        /// </summary>
+        /// <param name="name">The name of the <see cref="MapPolygonData"/>.</param>
+        /// <exception cref="ArgumentException">Thrown when <paramref name="name"/> is 
+        /// <c>null</c> or only whitespace.</exception>
+        public MapPolygonData(string name)
+            : this(name, new PolygonStyle(Color.DarkGray, Color.Black, 2)) {}
+
+        /// <summary>
         /// Creates a new instance of <see cref="MapPolygonData"/>.
         /// </summary>
         /// <param name="name">The name of the <see cref="MapPolygonData"/>.</param>
+        /// <param name="style">The style of the data.</param>
         /// <exception cref="ArgumentException">Thrown when <paramref name="name"/> is 
         /// <c>null</c> or only whitespace.</exception>
-        public MapPolygonData(string name) : base(name) {}
+        /// <exception cref="ArgumentNullException">Thrown when <paramref name="style"/>
+        /// is <c>null</c>.</exception>
+        public MapPolygonData(string name, PolygonStyle style) : base(name)
+        {
+            if (style == null)
+            {
+                throw new ArgumentNullException(nameof(style));
+            }
+            Style = style;
+        }
 
         /// <summary>
         /// Gets or sets the style of the polygon.
         /// </summary>
-        public PolygonStyle Style { get; set; }
+        public PolygonStyle Style { get; }
 
         /// <summary>
         /// This method validates newly set features.
Index: Core/Components/test/Core.Components.DotSpatial.Test/Converter/MapPolygonDataConverterTest.cs
===================================================================
diff -u -r67284323e2785c651633d9c52049ba12a9c70e6a -r7aa6b8425147795b1a87b552fe9d82ae5e9c7565
--- Core/Components/test/Core.Components.DotSpatial.Test/Converter/MapPolygonDataConverterTest.cs	(.../MapPolygonDataConverterTest.cs)	(revision 67284323e2785c651633d9c52049ba12a9c70e6a)
+++ Core/Components/test/Core.Components.DotSpatial.Test/Converter/MapPolygonDataConverterTest.cs	(.../MapPolygonDataConverterTest.cs)	(revision 7aa6b8425147795b1a87b552fe9d82ae5e9c7565)
@@ -232,10 +232,7 @@
             var mapPolygonLayer = new MapPolygonLayer();
             Color expectedFillColor = Color.FromKnownColor(fillColor);
             Color expectedOutlineFillColor = Color.FromKnownColor(outlineFillColor);
-            var mapPolygonData = new MapPolygonData("test")
-            {
-                Style = new PolygonStyle(expectedFillColor, expectedOutlineFillColor, width)
-            };
+            var mapPolygonData = new MapPolygonData("test", new PolygonStyle(expectedFillColor, expectedOutlineFillColor, width));
 
             // Call
             converter.ConvertLayerProperties(mapPolygonData, mapPolygonLayer);
Index: Core/Components/test/Core.Components.DotSpatial.Test/Layer/MapPolygonDataLayerTest.cs
===================================================================
diff -u -r67284323e2785c651633d9c52049ba12a9c70e6a -r7aa6b8425147795b1a87b552fe9d82ae5e9c7565
--- Core/Components/test/Core.Components.DotSpatial.Test/Layer/MapPolygonDataLayerTest.cs	(.../MapPolygonDataLayerTest.cs)	(revision 67284323e2785c651633d9c52049ba12a9c70e6a)
+++ Core/Components/test/Core.Components.DotSpatial.Test/Layer/MapPolygonDataLayerTest.cs	(.../MapPolygonDataLayerTest.cs)	(revision 7aa6b8425147795b1a87b552fe9d82ae5e9c7565)
@@ -54,7 +54,7 @@
         public void Constructor_MapPolygonDataWithTestProperties_MapPolygonDataLayerCreatedAccordingly()
         {
             // Setup
-            var mapPolygonData = new MapPolygonData("Test name");
+            var mapPolygonData = new MapPolygonData("Test name", new PolygonStyle(Color.AliceBlue, Color.Azure, 2));
 
             SetMapPolygonDataTestProperties(mapPolygonData);
 
@@ -72,7 +72,7 @@
         public void Update_MapPolygonDataWithTestProperties_MapPolygonDataLayerUpdatedAccordingly()
         {
             // Setup
-            var mapPolygonData = new MapPolygonData("Test name");
+            var mapPolygonData = new MapPolygonData("Test name", new PolygonStyle(Color.AliceBlue, Color.Azure, 2));
             var mapPolygonDataLayer = new MapPolygonDataLayer(mapPolygonData);
 
             SetMapPolygonDataTestProperties(mapPolygonData);
@@ -141,7 +141,6 @@
             mapPolygonData.IsVisible = false;
             mapPolygonData.ShowLabels = true;
             mapPolygonData.SelectedMetaDataAttribute = "Name";
-            mapPolygonData.Style = new PolygonStyle(Color.AliceBlue, Color.Azure, 2);
             mapPolygonData.Features = new[]
             {
                 CreateTestMapFeature()
@@ -155,7 +154,7 @@
             Assert.IsTrue(mapPolygonDataLayer.ShowLabels);
 
             Assert.IsNotNull(mapPolygonDataLayer.LabelLayer);
-            Assert.AreEqual(string.Format("[{0}]", "2"), mapPolygonDataLayer.LabelLayer.Symbology.Categories[0].Expression);
+            Assert.AreEqual("[2]", mapPolygonDataLayer.LabelLayer.Symbology.Categories[0].Expression);
 
             var firstPattern = (SimplePattern) mapPolygonDataLayer.Symbolizer.Patterns[0];
             Assert.AreEqual(Color.AliceBlue, firstPattern.FillColor);
@@ -175,7 +174,7 @@
             Assert.IsNull(mapPolygonDataLayer.LabelLayer.Symbology.Categories[0].Expression);
 
             var firstPattern = (SimplePattern) mapPolygonDataLayer.Symbolizer.Patterns[0];
-            Assert.AreEqual(1, firstPattern.Outline.GetWidth());
+            Assert.AreEqual(2, firstPattern.Outline.GetWidth());
 
             Assert.AreEqual(0, mapPolygonDataLayer.DataSet.Features.Count);
         }
Index: Core/Components/test/Core.Components.Gis.Test/Data/MapPolygonDataTest.cs
===================================================================
diff -u -r67284323e2785c651633d9c52049ba12a9c70e6a -r7aa6b8425147795b1a87b552fe9d82ae5e9c7565
--- Core/Components/test/Core.Components.Gis.Test/Data/MapPolygonDataTest.cs	(.../MapPolygonDataTest.cs)	(revision 67284323e2785c651633d9c52049ba12a9c70e6a)
+++ Core/Components/test/Core.Components.Gis.Test/Data/MapPolygonDataTest.cs	(.../MapPolygonDataTest.cs)	(revision 7aa6b8425147795b1a87b552fe9d82ae5e9c7565)
@@ -21,12 +21,14 @@
 
 using System;
 using System.Collections.Generic;
+using System.Drawing;
 using System.Linq;
 using Core.Common.Base.Geometry;
 using Core.Common.TestUtil;
 using Core.Components.Gis.Data;
 using Core.Components.Gis.Features;
 using Core.Components.Gis.Geometries;
+using Core.Components.Gis.Style;
 using NUnit.Framework;
 
 namespace Core.Components.Gis.Test.Data
@@ -44,6 +46,9 @@
             Assert.AreEqual("test data", data.Name);
             Assert.IsEmpty(data.Features);
             Assert.IsInstanceOf<FeatureBasedMapData>(data);
+            Assert.AreEqual(Color.DarkGray, data.Style.FillColor);
+            Assert.AreEqual(Color.Black, data.Style.StrokeColor);
+            Assert.AreEqual(2, data.Style.Width);
         }
 
         [Test]
@@ -61,6 +66,33 @@
         }
 
         [Test]
+        public void Constructor_StyleNull_ThrowArgumentNullException()
+        {
+            // Call
+            TestDelegate test = () => new MapPolygonData("test data", null);
+
+            // Assert
+            var exception = Assert.Throws<ArgumentNullException>(test);
+            Assert.AreEqual("style", exception.ParamName);
+        }
+
+        [Test]
+        public void Constructor_WithStyle_ExpectedValues()
+        {
+            // Setup
+            var style = new PolygonStyle(Color.Aqua, Color.DarkGoldenrod, 3);
+
+            // Call
+            var data = new MapPolygonData("test data", style);
+
+            // Assert
+            Assert.AreEqual("test data", data.Name);
+            Assert.IsEmpty(data.Features);
+            Assert.IsInstanceOf<FeatureBasedMapData>(data);
+            Assert.AreSame(style, data.Style);
+        }
+
+        [Test]
         public void Features_SetValidNewValue_GetsNewValue()
         {
             // Setup