The search for an exception handler can unwind the stack. This means that if the currently running function does not handle the exception, the current function terminates and the calling function gets a chance to handle the exception. If none of the calling functions handles it, the exception ultimately is handled by the Common Language Runtime (CLR), which abruptly terminates your program.
If function A calls function B and function B calls function C, these function calls are all placed on the stack. When a programmer talks about "unwinding the stack" what is meant is that you back up from C to B to A.
If you must unwind the stack from C to B to A to handle the exception, when you are done, you are in A; there is no automatic return to C.
If you return all the way to the first method (Main) and no exception handler is found, the default exception handler (provided by the compiler) is invoked. The default exception handler just terminates the program.
VISUAL STUDIO INTRODUCTION
C SHARP INTRODUCTION
C SHARP OUT LOOK
DOT NET AND C SHARP
C SHARP APPLICATION STRICTURE
OOPS AND C SHARP
IDE AND C SHARP
INSTANTIATING OBJECTS IN C SHARP
CLASSES AND OBJECTS IN C SHARP
OPERATORS IN C SHARP
SWITCH AND ITERATION IN C SHARP
BRANCHING IN C SHARP
CONSTANTS AND STRING