获取n级父目录名称

DirectoryInfo GetPrant(DirectoryInfo path, int level)
{
    DirectoryInfo temp = null;

    if (level > 1)
    {
        level--;
        temp = GetPrant(path.Parent, level);
    }
    else
        temp = path;
    return (temp);
}

调用

int LEVEL = 10;
string NAME =  GetPrant(Directory.GetParent(FullPath), LEVEL ).Name;

LEVEL 为父目录级别，1为本身；FullPath为全路径，通过路径过去对应目录