我从根目录的这个文件夹中有 OpenSans-Light.ttf:~/fonts/open-sans/OpenSans-Light.ttf
PrivateFontCollection privateFontCollection = new PrivateFontCollection();
privateFontCollection.AddFontFile("~/fonts/open-sans/OpenSans-Light.ttf");
但我得到“System.IO.FileNotFoundException:找不到文件”
如何定位该字体文件?