C# 获得运行时的各种目录以及当前用户的桌面，收藏夹，缓存等系

Assembly myAssembly = Assembly.GetEntryAssembly();
string path = myAssembly.Location;
DirectoryInfo dr = new DirectoryInfo(path);
path=dr.Parent;  //当前目录的上一级目录

System.Environment.CurrentDirectory;
//例: c:test
Application.ExecutablePath;(包括名称）
//例: c:testmyapp.exe
Application.StartupPath;（不包括名称）
//例: c:test

string str = System.Diagnostics.Process.GetCurrentProcess().MainModule.FileName;
result: X:xxxxxxxxx.exe (.exe文件所在的目录+.exe文件名)

string str = System.Environment.CurrentDirectory;

string str = System.AppDomain.CurrentDomain.BaseDirectory;

string str = System.AppDomain.CurrentDomain.SetupInformation.ApplicationBase;

string str = System.Windows.Forms.Application.StartupPath;

string str = System.Windows.Forms.Application.ExecutablePath;

string str = System.IO.Directory.GetCurrentDirectory();

System.Environment.GetFolderPath(System.Environment.SpecialFolder.Favorites)

System.Environment.GetFolderPath(System.Environment.SpecialFolder.Desktop)