Fixed inproper use of UTF8Encoding. As it was written before,...

Fixed inproper use of UTF8Encoding. As it was written before, UTF8Encoding.Default actually returns base class static property Encoding.Default which is system's default ANSI code-page based encoding that is not UTF8.

Samples/SVGViewer/SvgViewer.cs

@@ -31,7 +31,7 @@ namespace SVGViewer
 
         private void textBox1_TextChanged(object sender, EventArgs e)
         {
-        	using(var s = new MemoryStream(UTF8Encoding.Default.GetBytes(textBox1.Text)))
+        	using(var s = new MemoryStream(Encoding.UTF8.GetBytes(textBox1.Text)))
         	{
         		SvgDocument svgDoc = SvgDocument.Open<SvgDocument>(s, null);
         		RenderSvg(svgDoc);