Hi, I saw an MSDN web page on the subject; it waw terribly complex, checking lots of things, and switching; I did not note the link. And then there is the registry key @"HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\ProductName" which is good enough for me. :) Luc Pattyn [Forum Guidelines] [My Articles] Fixturized forever. :confused:

private static bool F ( object o , System.Type t ) { if ( o == null ) { throw ( new System.ArgumentNullException() ) ; } return ( t.IsAssignableFrom ( o.GetType() ) ) ; } And may I humbly suggest my TypeTransmogrifier[^] ?

Recommendations: 1) Don't use "class" for a class name... really don't. use "Course" or something appropriate. Never use keywords as class names or in parts of class names. 2) If it has to do with the class directly, then put it into that class. i.e. I'd put public static GetStudent() into the Student class. 3) Remember the "has-a" and "is-a" relationship. Curriculum has Courses. Courses have Students. I don't think you have a problem that requires inheritance here, so don't worry about the "is-a" relationship. 4) When you have problems getting started, it helps greatly to do the UML, even if it's sloppy who cares as long as you get a better understanding of the problem. Use a pencil and paper, don't worry about visio or other fancy tools. Pencils are twice as fast as visio - easy. 5) I presume that this is a student assignment? I'll give you a hint here, what you have is a nested problem, if you solve the Course/Students relationship, then you solved the Curriculum/Courses relationship. Curriculum -Courses +Add(Course) +Remove(Course) +this[index] Course -Students +Add(Student) +Remove(Student) +this[index] +GetCourse(fromDB) Student -StudentInfo() //Info that I'm not going to go through. +GetStudent(fromDB) Scott P “It is practically impossible to teach good programming to students that have had a prior exposure to BASIC: as potential programmers they are mentally mutilated beyond hope of regeneration.” -Edsger Dijkstra

It sounds a little suspect the way you are trying to do it.... but the way to do what you are trying is; public abstract class connection { private static TCPClient _client = new TCPClient(); public static void Connect(String hostname, int port) { try { \_client.Connect(hostname, port); return true; } catch (Exception e) { return false; } } public static bool IsConnected { get { return \_client.Connected; } } } You would the access via; connection.Connect("192.168.0.1", "50"); Console.WriteLine("Is it connected? " + connection.IsConnected.ToString()); Someone else would be better able to answer this, but this seams very insecure and there is no protection of the TCPClient which potentially is sending user data?