//获取模块的完整路径。
string path1 = System.Diagnostics.Process.GetCurrentProcess().MainModule.FileName;
//获取和设置当前目录(该进程从中启动的目录)的完全限定目录
string path2 = System.Environment.CurrentDirectory;
//获取应用程序的当前工作目录
string path3 = System.IO.Directory.GetCurrentDirectory();
//获取程序的基目录
string path4 = System.AppDomain.CurrentDomain.BaseDirectory;
//获取和设置包括该应用程序的目录的名称
string path5 = System.AppDomain.CurrentDomain.SetupInformation.ApplicationBase;
//获取启动了应用程序的可执行文件的路径
string path6 = System.Windows.Forms.Application.StartupPath;
//获取启动了应用程序的可执行文件的路径及文件名
string path7 = System.Windows.Forms.Application.ExecutablePath;

StringBuilder str=new StringBuilder();
str.AppendLine("System.Diagnostics.Process.GetCurrentProcess().MainModule.FileName:" + path1);
str.AppendLine("System.Environment.CurrentDirectory:" + path2);
str.AppendLine("System.IO.Directory.GetCurrentDirectory():" + path3);
str.AppendLine("System.AppDomain.CurrentDomain.BaseDirectory:" + path4);
str.AppendLine("System.AppDomain.CurrentDomain.SetupInformation.ApplicationBase:" + path5);
str.AppendLine("System.Windows.Forms.Application.StartupPath:" + path6);
str.AppendLine("System.Windows.Forms.Application.ExecutablePath:" + path7);
string allPath = str.ToString();

System.Diagnostics.Process.GetCurrentProcess().MainModule.FileName:D:\work\prj\VP-VPlatform\XmlAndXsd\bin\Release\XmlAndXsd.vshost.exe
 System.Environment.CurrentDirectory:D:\work\prj\VP-VPlatform\XmlAndXsd\bin\Release
 System.IO.Directory.GetCurrentDirectory():D:\work\prj\VP-VPlatform\XmlAndXsd\bin\Release
 System.AppDomain.CurrentDomain.BaseDirectory:D:\work\prj\VP-VPlatform\XmlAndXsd\bin\Release\
System.AppDomain.CurrentDomain.SetupInformation.ApplicationBase:D:\work\prj\VPVPlatform\XmlAndXsd\bin\Release\
 System.Windows.Forms.Application.StartupPath:D:\work\prj\VP-VPlatform\XmlAndXsd\bin\Release
System.Windows.Forms.Application.ExecutablePath:D:\work\prj\VPVPlatform\XmlAndXsd\bin\Release\XmlAndXsd.EXE