在运行一个例子时出现如下错误怎么解决：The type or namespace name \'Office\' could not be found (are you missing a using directive or an assembly reference?)注：我已经添加了引用，用了using Microsoft.Office.Core;提示错误的代码如下（就是下面第一行出现的office处有错）：private void AddSubButton(Office.CommandBarPopup cb, string buttonName)
{
try
{
}
catch (Exception exc)
{
}
}
