marked assembly as CLSCompliant

Main/Source/ExtendedWPFToolkitSolution/Src/WPFToolkit.Extended/Properties/AssemblyInfo.cs

@@ -1,4 +1,5 @@
-using System.Reflection;
+using System;
+using System.Reflection;
 using System.Resources;
 using System.Runtime.CompilerServices;
 using System.Runtime.InteropServices;
@@ -22,6 +23,8 @@ using System.Windows.Markup;
 // COM, set the ComVisible attribute to true on that type.
 [assembly: ComVisible(false)]
 
+[assembly: CLSCompliant(true)]
+
 //In order to begin building localizable applications, set 
 //<UICulture>CultureYouAreCodingWith</UICulture> in your .csproj file
 //inside a <PropertyGroup>.  For example, if you are using US english