WPF绑定动态添加的控件

我将在我的RibbonWindow中向“Company”RibbonApplication菜单项添加a,代码如下:

  var reset = DataContext as ICompanies;
  if (reset != null)
  {

    // ToDo: Create interface to populate the mymenutems
    var mymenuitems = new List<string>();
    foreach (var item in mymenuitems)
    {
      var newbutton = new Button { Margin = new Thickness(2), Content = item };
      MenuItem_Company.Items.Add(newbutton);
    }
  }

我的XAML如下:

<ribbon:RibbonApplicationMenu ToolTipTitle="Application Menu">
    <ribbon:RibbonApplicationMenuItem 
        Header="Company"
        x:Name="MenuItem_Company"
        ImageSource="Images\LargeIcon.png">                     
    </ribbon:RibbonApplicationMenuItem>
</ribbon:RibbonApplicationMenu>

当我将新按钮添加到menuitem_公司时,如何在代码中绑定它?我需要它绑定到DataContext中的属性。

谢谢, 厄洛克