Background Threads in C#

Question

I am new to C#.I learnt that normally all threads are foreground until unless you explicitly specify it as \"background\" thread using IsBackGround= true .

Answer 1

1) What is the advantage of keeping a thread as background thread?

The Advantage is that a Background Thread doesn't stop the Program from terminating. In a large Application it could be a bit hard to deactivate all threads if you want to quit the Application.

Apart from Join() could i use other techniques to keep the main thread wait?

If yo want to make the Main program wait why do you make the thread a background thread in the first place then??? Besides of Join() you could use a EventWaitHandle or Monitor to make the main method wait.