The quickest way that I know of is to
- add the folder to your project file directory using Windows Explorer
- find the folder in Solution Explorer (make sure Show All Files is checked)
- right click on the folder and select Include In Project
You may have to do the folder and the files separately, but you can select multiple files at once.
与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…