从WinForms & link表单应用中打开一个WPF窗口

I'm using Visual studio 2012 & I'm using Win Form app called Form1 & add a new item which is wpf Window is called "wpfWin". I want to open the wpfWin through a button in the Form1 once it's clicked, it opened - separated windows-.I'm using Visual studio 2012 & I'm using Win Fo