diff --git a/Source/Basic Shapes/SvgLine.cs b/Source/Basic Shapes/SvgLine.cs
index 348c8a07d4d62fccaf0c5acbddcd204132625424..1ece3ee9ce991ca9dc99406a26ae8e8f5230a368 100644
--- a/Source/Basic Shapes/SvgLine.cs	
+++ b/Source/Basic Shapes/SvgLine.cs	
@@ -4,6 +4,7 @@ using System.Text;
 using System.ComponentModel;
 using System.Drawing;
 using System.Drawing.Drawing2D;
+using Svg.ExtensionMethods;
 
 namespace Svg
 {
@@ -85,7 +86,7 @@ namespace Svg
         [SvgAttribute("marker-end")]
         public Uri MarkerEnd
         {
-            get { return this.Attributes.GetAttribute<Uri>("marker-end"); }
+            get { return this.Attributes.GetAttribute<Uri>("marker-end").ReplaceWithNullIfNone(); }
             set { this.Attributes["marker-end"] = value; }
         }
 
@@ -96,7 +97,7 @@ namespace Svg
         [SvgAttribute("marker-mid")]
         public Uri MarkerMid
         {
-            get { return this.Attributes.GetAttribute<Uri>("marker-mid"); }
+            get { return this.Attributes.GetAttribute<Uri>("marker-mid").ReplaceWithNullIfNone(); }
             set { this.Attributes["marker-mid"] = value; }
         }
 
@@ -107,7 +108,7 @@ namespace Svg
         [SvgAttribute("marker-start")]
         public Uri MarkerStart
         {
-            get { return this.Attributes.GetAttribute<Uri>("marker-start"); }
+	        get { return this.Attributes.GetAttribute<Uri>("marker-start").ReplaceWithNullIfNone(); }
             set { this.Attributes["marker-start"] = value; }
         }
 
diff --git a/Source/Basic Shapes/SvgPolygon.cs b/Source/Basic Shapes/SvgPolygon.cs
index a59a32832cc7dc97cd2122e3f29d17c8327e396a..7eb427b59a156ce032297afafaebcca9fa61b1d9 100644
--- a/Source/Basic Shapes/SvgPolygon.cs	
+++ b/Source/Basic Shapes/SvgPolygon.cs	
@@ -4,6 +4,7 @@ using System.Text;
 using System.Drawing;
 using System.Drawing.Drawing2D;
 using System.Diagnostics;
+using Svg.ExtensionMethods;
 using Svg.Pathing;
 
 namespace Svg
@@ -32,7 +33,7 @@ namespace Svg
         [SvgAttribute("marker-end")]
         public Uri MarkerEnd
         {
-            get { return this.Attributes.GetAttribute<Uri>("marker-end"); }
+            get { return this.Attributes.GetAttribute<Uri>("marker-end").ReplaceWithNullIfNone(); }
             set { this.Attributes["marker-end"] = value; }
         }
 
@@ -43,7 +44,7 @@ namespace Svg
         [SvgAttribute("marker-mid")]
         public Uri MarkerMid
         {
-            get { return this.Attributes.GetAttribute<Uri>("marker-mid"); }
+            get { return this.Attributes.GetAttribute<Uri>("marker-mid").ReplaceWithNullIfNone(); }
             set { this.Attributes["marker-mid"] = value; }
         }
 
@@ -54,7 +55,7 @@ namespace Svg
         [SvgAttribute("marker-start")]
         public Uri MarkerStart
         {
-            get { return this.Attributes.GetAttribute<Uri>("marker-start"); }
+            get { return this.Attributes.GetAttribute<Uri>("marker-start").ReplaceWithNullIfNone(); }
             set { this.Attributes["marker-start"] = value; }
         }
 
diff --git a/Source/Basic Shapes/SvgPolyline.cs b/Source/Basic Shapes/SvgPolyline.cs
index 0aa692424a48b59f5c635c557c9416d537bccce2..650b8fad405f506490ecaaa5ae50de0067ee3cc0 100644
--- a/Source/Basic Shapes/SvgPolyline.cs	
+++ b/Source/Basic Shapes/SvgPolyline.cs	
@@ -4,6 +4,7 @@ using System.Text;
 using System.Drawing;
 using System.Drawing.Drawing2D;
 using System.Diagnostics;
+using Svg.ExtensionMethods;
 
 namespace Svg
 {
@@ -19,7 +20,7 @@ namespace Svg
         [SvgAttribute("marker-end")]
         public Uri MarkerEnd
         {
-            get { return this.Attributes.GetAttribute<Uri>("marker-end"); }
+            get { return this.Attributes.GetAttribute<Uri>("marker-end").ReplaceWithNullIfNone(); }
             set { this.Attributes["marker-end"] = value; }
         }
 
@@ -30,7 +31,7 @@ namespace Svg
         [SvgAttribute("marker-mid")]
         public Uri MarkerMid
         {
-            get { return this.Attributes.GetAttribute<Uri>("marker-mid"); }
+            get { return this.Attributes.GetAttribute<Uri>("marker-mid").ReplaceWithNullIfNone(); }
             set { this.Attributes["marker-mid"] = value; }
         }
 
@@ -41,7 +42,7 @@ namespace Svg
         [SvgAttribute("marker-start")]
         public Uri MarkerStart
         {
-            get { return this.Attributes.GetAttribute<Uri>("marker-start"); }
+            get { return this.Attributes.GetAttribute<Uri>("marker-start").ReplaceWithNullIfNone(); }
             set { this.Attributes["marker-start"] = value; }
         }
 
diff --git a/Source/ExtensionMethods/UriExtensions.cs b/Source/ExtensionMethods/UriExtensions.cs
new file mode 100644
index 0000000000000000000000000000000000000000..aa300f9945471bc8e0b162032a90493aadded7a2
--- /dev/null
+++ b/Source/ExtensionMethods/UriExtensions.cs
@@ -0,0 +1,16 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+
+namespace Svg.ExtensionMethods
+{
+	public static class UriExtensions
+	{
+		public static Uri ReplaceWithNullIfNone(this Uri uri)
+		{
+			if(uri == null) { return null; }
+			return string.Equals(uri.ToString(), "none", StringComparison.OrdinalIgnoreCase) ? null : uri;		
+		}
+	}
+}
diff --git a/Source/Paths/SvgPath.cs b/Source/Paths/SvgPath.cs
index 9d5c2ea837f44e769102846a8eb896f57b0c2b76..ce9e322413873f4fcf6a4e6acdf7fcad61382e91 100644
--- a/Source/Paths/SvgPath.cs
+++ b/Source/Paths/SvgPath.cs
@@ -6,6 +6,7 @@ using System.Drawing.Drawing2D;
 using System.Xml.Serialization;
 using System.Xml;
 using System.Diagnostics;
+using Svg.ExtensionMethods;
 using Svg.Pathing;
 using Svg.Transforms;
 
@@ -51,7 +52,7 @@ namespace Svg
         [SvgAttribute("marker-end", true)]
 		public Uri MarkerEnd
         {
-			get { return this.Attributes.GetAttribute<Uri>("marker-end"); }
+			get { return this.Attributes.GetAttribute<Uri>("marker-end").ReplaceWithNullIfNone(); }
 			set { this.Attributes["marker-end"] = value; }
 		}
 
@@ -62,7 +63,7 @@ namespace Svg
         [SvgAttribute("marker-mid", true)]
 		public Uri MarkerMid
 		{
-			get { return this.Attributes.GetAttribute<Uri>("marker-mid"); }
+			get { return this.Attributes.GetAttribute<Uri>("marker-mid").ReplaceWithNullIfNone(); }
 			set { this.Attributes["marker-mid"] = value; }
 		}
 
@@ -73,7 +74,7 @@ namespace Svg
         [SvgAttribute("marker-start", true)]
 		public Uri MarkerStart
 		{
-			get { return this.Attributes.GetAttribute<Uri>("marker-start"); }
+			get { return this.Attributes.GetAttribute<Uri>("marker-start").ReplaceWithNullIfNone(); }
 			set { this.Attributes["marker-start"] = value; }
 		}
 
diff --git a/Source/Svg.csproj b/Source/Svg.csproj
index ea132a119e11395dd05e6a30dd2e8252005a1aa7..36f894f70f351798bb97b0a148bab1114f88281f 100644
--- a/Source/Svg.csproj
+++ b/Source/Svg.csproj
@@ -107,6 +107,7 @@
     <Compile Include="DataTypes\SvgTextPathSpacing.cs" />
     <Compile Include="DataTypes\XmlSpaceHandling.cs" />
     <Compile Include="Document Structure\SvgSymbol.cs" />
+    <Compile Include="ExtensionMethods\UriExtensions.cs" />
     <Compile Include="Filter Effects\ImageBuffer.cs" />
     <Compile Include="Painting\GenericBoundable.cs" />
     <Compile Include="Painting\SvgFallbackPaintServer .cs" />