jhauge/Master.master.aspx

## Master.master.aspx
<%@ Master Language="C#" MasterPageFile="~/umbraco/masterpages/default.master" AutoEventWireup="true"
    CodeBehind="Master.master.cs" Inherits="Web.masterpages.Master" %>

<asp:Content runat="server" ContentPlaceHolderID="ContentPlaceHolderDefault"><!doctype html>
<html class="no-js" lang="en">
<head>
</head>
<body>
</body>
<!--
  Script to load a variable telling about the current language
  Insert before other scripts
-->
<script>
  // This script will create a variable with the two-letter language code
  // The value will allways be available as UI.currentUiLanguage
  var UI = UI || {}; // Namespacing
  UI.currentUiLanguage = '<%= CurrentUiLanguage %>'; // Will be written out from Masters codebehind
</script>
</html>
</asp:Content>

## Master.master.cs
using System;
using System.Web.UI;
using umbraco.NodeFactory;

namespace Web.masterpages
{
  public partial class Master : MasterPage
  {
    private readonly Node _currentNode = Node.GetCurrent();

    public Master()
    {
      Init += PageInit;
    }

    public string CurrentUiLanguage { get; set; }

    private void PageInit(object sender, EventArgs e)
    {
      // Set the value of CurrentUiLanguae, using default ASP.NET access method
      // This property is what the Umbraco API, sets when determining the language from
      // assigned domains
      CurrentUiLanguage = System.Threading.Thread.CurrentThread.CurrentCulture.TwoLetterISOLanguageName
    }
  }
}
	<%@ Master Language="C#" MasterPageFile="~/umbraco/masterpages/default.master" AutoEventWireup="true"
	CodeBehind="Master.master.cs" Inherits="Web.masterpages.Master" %>

	<asp:Content runat="server" ContentPlaceHolderID="ContentPlaceHolderDefault"><!doctype html>
	<html class="no-js" lang="en">
	<head>
	</head>
	<body>
	</body>
	<!--
	Script to load a variable telling about the current language
	Insert before other scripts
	-->
	<script>
	// This script will create a variable with the two-letter language code
	// The value will allways be available as UI.currentUiLanguage
	var UI = UI \|\| {}; // Namespacing
	UI.currentUiLanguage = '<%= CurrentUiLanguage %>'; // Will be written out from Masters codebehind
	</script>
	</html>
	</asp:Content>
	using System;
	using System.Web.UI;
	using umbraco.NodeFactory;

	namespace Web.masterpages
	{
	public partial class Master : MasterPage
	{
	private readonly Node _currentNode = Node.GetCurrent();

	public Master()
	{
	Init += PageInit;
	}

	public string CurrentUiLanguage { get; set; }

	private void PageInit(object sender, EventArgs e)
	{
	// Set the value of CurrentUiLanguae, using default ASP.NET access method
	// This property is what the Umbraco API, sets when determining the language from
	// assigned domains
	CurrentUiLanguage = System.Threading.Thread.CurrentThread.CurrentCulture.TwoLetterISOLanguageName
	}
	}
	}