Add: shape-rendering; Fix: CurrentCulture

Fix:
Now the application make sure to set back the old culture even an error
occurred.
SvgColourConverter.ConvertFrom
SvgPathBuilder.ConvertTo
SvgDocument.Write
SvgExtentions.GetXML

Add:
Attribute: "shape-rendering"

Change:
- Many other properties were unknowingly overloaded. I changed them to
override.
- Some methods or structures need the [CLSCompliant(false)] Attribute.
For example the Enums.TryParse extension. This extension has the where
condition IConvertible. IConvertible is [CLSCompliant(false)] and that
the reason why it is correct to mark the Enums.TryParse extension also
as [CLSCompliant(false)].
- Property "float Opacity" in SvgElement was unknowingly overloaded in
SvgGradientStop as string [stop-opacity]. In the end this property was
only used as float. I changed the SvgGradientStop.Opacity property from
string to float and to override.

Source/SvgExtentions.cs

@@ -49,6 +49,8 @@ namespace Svg
             var result = "";
 
             var currentCulture = Thread.CurrentThread.CurrentCulture;
+            try
+            {
                 Thread.CurrentThread.CurrentCulture = CultureInfo.InvariantCulture;
                 using (StringWriter str = new StringWriter())
                 {
@@ -59,7 +61,12 @@ namespace Svg
 
                     }
                 }
+            }
+            finally
+            {
+                // Make sure to set back the old culture even an error occurred.
                 Thread.CurrentThread.CurrentCulture = currentCulture;
+            }
             
             return result;
         }
@@ -73,7 +80,7 @@ namespace Svg
         {
             action(elem);
 
-        	if(!(elem is SvgDocument)) //don't apply action to subtree of documents
+            if (!(elem is SvgDocument)) //don't apply action to subtree of documents
             {
                 foreach (var element in elem.Children)
                 {
@@ -84,7 +91,7 @@ namespace Svg
 
         public static void ApplyRecursiveDepthFirst(this SvgElement elem, Action<SvgElement> action)
         {
-        	if(!(elem is SvgDocument)) //don't apply action to subtree of documents
+            if (!(elem is SvgDocument)) //don't apply action to subtree of documents
             {
                 foreach (var element in elem.Children)
                 {

Source/Text/FontFamily.cs

@@ -133,6 +133,7 @@ namespace Svg.Text
             }
         }
 
+        [CLSCompliant(false)]
         public struct TT_OFFSET_TABLE
         {
             public ushort uMajorVersion;
@@ -143,6 +144,7 @@ namespace Svg.Text
             public ushort uRangeShift;
         }
 
+        [CLSCompliant(false)]
         public struct TT_TABLE_DIRECTORY
         {
             public byte[] szTag;
@@ -155,6 +157,7 @@ namespace Svg.Text
             }
         }
 
+        [CLSCompliant(false)]
         public struct TT_NAME_TABLE_HEADER
         {
             public ushort uFSelector;
@@ -162,6 +165,7 @@ namespace Svg.Text
             public ushort uStorageOffset;
         }
 
+        [CLSCompliant(false)]
         public struct TT_NAME_RECORD
         {
             public ushort uPlatformID;

Source/Text/SvgFontFace.cs

@@ -62,7 +62,7 @@ namespace Svg
         /// Indicates which font family is to be used to render the text.
         /// </summary>
         [SvgAttribute("font-family")]
-        public virtual string FontFamily
+        public override string FontFamily
         {
             get { return this.Attributes["font-family"] as string; }
             set { this.Attributes["font-family"] = value; }
@@ -72,7 +72,7 @@ namespace Svg
         /// Refers to the size of the font from baseline to baseline when multiple lines of text are set solid in a multiline layout environment.
         /// </summary>
         [SvgAttribute("font-size")]
-        public virtual SvgUnit FontSize
+        public override SvgUnit FontSize
         {
             get { return (this.Attributes["font-size"] == null) ? SvgUnit.Empty : (SvgUnit)this.Attributes["font-size"]; }
             set { this.Attributes["font-size"] = value; }
@@ -82,7 +82,7 @@ namespace Svg
         /// Refers to the style of the font.
         /// </summary>
         [SvgAttribute("font-style")]
-        public virtual SvgFontStyle FontStyle
+        public override SvgFontStyle FontStyle
         {
             get { return (this.Attributes["font-style"] == null) ? SvgFontStyle.All : (SvgFontStyle)this.Attributes["font-style"]; }
             set { this.Attributes["font-style"] = value; }
@@ -92,7 +92,7 @@ namespace Svg
         /// Refers to the varient of the font.
         /// </summary>
         [SvgAttribute("font-variant")]
-        public virtual SvgFontVariant FontVariant
+        public override SvgFontVariant FontVariant
         {
             get { return (this.Attributes["font-variant"] == null) ? SvgFontVariant.Inherit : (SvgFontVariant)this.Attributes["font-variant"]; }
             set { this.Attributes["font-variant"] = value; }
@@ -102,7 +102,7 @@ namespace Svg
         /// Refers to the boldness of the font.
         /// </summary>
         [SvgAttribute("font-weight")]
-        public virtual SvgFontWeight FontWeight
+        public override SvgFontWeight FontWeight
         {
             get { return (this.Attributes["font-weight"] == null) ? SvgFontWeight.Inherit : (SvgFontWeight)this.Attributes["font-weight"]; }
             set { this.Attributes["font-weight"] = value; }

Source/Text/SvgGlyph.cs

@@ -79,15 +79,6 @@ namespace Svg
             return _path;
         }
 
-        
-        /// <summary>
-        /// Gets or sets a value to determine if anti-aliasing should occur when the element is being rendered.
-        /// </summary>
-        protected override bool RequiresSmoothRendering
-        {
-            get { return true; }
-        }
-
         /// <summary>
         /// Gets the bounds of the element.
         /// </summary>

Source/Text/SvgTextBase.cs

@@ -13,10 +13,10 @@ namespace Svg
 {
     public abstract class SvgTextBase : SvgVisualElement
     {
-        protected SvgUnitCollection _x = new SvgUnitCollection();
-        protected SvgUnitCollection _y = new SvgUnitCollection();
-        protected SvgUnitCollection _dy = new SvgUnitCollection();
-        protected SvgUnitCollection _dx = new SvgUnitCollection();
+        [CLSCompliant(false)] protected SvgUnitCollection _x = new SvgUnitCollection();
+        [CLSCompliant(false)] protected SvgUnitCollection _y = new SvgUnitCollection();
+        [CLSCompliant(false)] protected SvgUnitCollection _dy = new SvgUnitCollection();
+        [CLSCompliant(false)] protected SvgUnitCollection _dx = new SvgUnitCollection();
         private string _rotate;
         private List<float> _rotations = new List<float>();
 
@@ -215,15 +215,6 @@ namespace Svg
             return this.Text;
         }
 
-        /// <summary>
-        /// Gets or sets a value to determine if anti-aliasing should occur when the element is being rendered.
-        /// </summary>
-        /// <value></value>
-        protected override bool RequiresSmoothRendering
-        {
-            get { return true; }
-        }
-
         /// <summary>
         /// Gets the bounds of the element.
         /// </summary>

Tests/Svg.UnitTests/MultiThreadingTest.cs

@@ -34,7 +34,6 @@ namespace Svg.UnitTests
 		[TestMethod]
 		public void TestMultiThread()
 		{
-			bool valid = true;
 			Parallel.For(0, 10, (x) =>
 			{
 				LoadFile();