namespace name 'Styles' does not exist

Getting a weird issue here, my project is working fine with NO errors until I create a new Window. I have got a folder in my project named "Views", which I add the Window to.

This is the error:

[quote]

The type or namespace name 'Styles' does not exist in the namespace 'Test_Project' (are you missing an assembly reference?)

[/quote]

The error is being caused by the line I have marked below in my new window (Window1.g.cs)

using System.Windows;

using System.Windows.Automation;

using System.Windows.Controls;

using System.Windows.Controls.Primitives;

using System.Windows.Data;

using System.Windows.Documents;

using System.Windows.Ink;

using System.Windows.Input;

using System.Windows.Markup;

using System.Windows.Media;

using System.Windows.Media.Animation;

using System.Windows.Media.Effects;

using System.Windows.Media.Imaging;

using System.Windows.Media.Media3D;

using System.Windows.Media.TextFormatting;

using System.Windows.Navigation;

using System.Windows.Shapes;

using System.Windows.Shell;

using Test_Project.Converters;

using Test_Project.Styles;

using Test_Project.Views;

namespace Test_Project.Views {

///

/// Window1

///

public partial class Window1 : System.Windows.Window, System.Windows.Markup.IComponentConnector {

private bool _contentLoaded;