Need help in designing my program C# [on hold]

what's up ? I'm need on programming with C# , I made some small programs like a dictionary for abbreviations for petroleum engineers , now I'm working on making a program that make a groups for students as the picture below Link to picture : http://ift.tt/1EOvUaH

Now , I need help in how to write the names under each group, i want it to be random names in each click.. if any one can help me with this , please help me