C# 如何获取可执行文件路径的上上级目录

第一种：

DirectoryInfo di = new DirectoryInfo(string.Format(@"{0}..\..\", Application.StartupPath));di.FullName

..\有几个就是往回退几层

第二种：

DirectoryInfo info = new DirectoryInfo(Application.StartupPath);String path = info.Parent.Parent.FullName;

第三种：

string WantedPath = Application.StartupPath.Substring(0,Application.StartupPath.LastIndexOf(@"\"));