I've noticed in my programs sometimes the GUI controls things and calls the guts, other times the guts control the program and calls the GUI. Take Sudoku for example. You could write a solver such ...

This is a valid program that is required to run at startup. This program is required to run on startup in order to benefit from its functionality or so that the program will work. The following ...

This is a valid program, but it is up to you whether or not you want it to run on startup. Whether or not you need to run this program on startup must be decided by you. If you feel that you want this ...

There is a variety of GUI frameworks for .NET: Microsoft itself offers several alternatives and the agony of choice is now greater than ever, as three external providers are also involved in the ...