Add support for detecting the Visual Studio version

RESW File Code Generator/VSPackage/CustomTool/CodeGeneratorFactory.cs

@@ -1,6 +1,9 @@
-using System.CodeDom;
+using System;
 using System.CodeDom.Compiler;
 using System.Reflection;
+using EnvDTE;
+using Microsoft.VisualStudio.Shell;
+using Microsoft.VisualStudio.Shell.Interop;
 
 namespace ChristianHelle.DeveloperTools.CodeGenerators.Resw.VSPackage.CustomTool
 {
@@ -8,7 +11,23 @@ namespace ChristianHelle.DeveloperTools.CodeGenerators.Resw.VSPackage.CustomTool
     {
         public ICodeGenerator Create(string className, string defaultNamespace, string inputFileContents, CodeDomProvider codeDomProvider = null, TypeAttributes? classAccessibility = null)
         {
-            return new CodeDomCodeGenerator(new ResourceParser(inputFileContents), className, defaultNamespace, codeDomProvider, classAccessibility);
+            return new CodeDomCodeGenerator(new ResourceParser(inputFileContents), className, defaultNamespace, codeDomProvider, classAccessibility, VisualStudioHelper.GetVersion());
+        }
+    }
+
+    public static class VisualStudioHelper
+    {
+        public static VisualStudioVersion GetVersion()
+        {
+            var dte = Package.GetGlobalService(typeof(SDTE)) as DTE;
+            var vsVersion = VisualStudioVersion.VS2012;
+            if (dte != null)
+            {
+                Version dteVersion;
+                if (Version.TryParse(dte.Version, out dteVersion) && dteVersion >= new Version(12, 0))
+                    vsVersion = VisualStudioVersion.VS2013;
+            }
+            return vsVersion;
         }
     }
 }

RESW File Code Generator/VSPackage/CustomTool/VisualStudioVersion.cs

@@ -3,6 +3,7 @@ namespace ChristianHelle.DeveloperTools.CodeGenerators.Resw.VSPackage.CustomTool
     public enum VisualStudioVersion
     {
         VS2012,
-        VS2013
+        VS2013,
+        Unknown
     }
 }