System.IO.Directory.GetCurrentDirectory();
/////////////////////////
Application.StartupPath
System.IO.Path.GetDirectoryName( System.Reflection.Assembly.GetExecutingAssembly().Location)
AppDomain.CurrentDomain.BaseDirectory
System.IO.Directory.GetCurrentDirectory()
Environment.CurrentDirectory
System.IO.Path.GetDirectoryName( System.Reflection.Assembly.GetExecutingAssembly().GetName().Code Base)
System.IO.Path.GetDirectory(Application.ExecutablePath)