C # Exit Program method

1.this.   Close (); Just close the current window, if it is not the main form, you can not quit the program, and if there is a managed thread (not the main threads), also can not cleanly exit;

2.application.exit (); Forces all messages to abort, exits all forms, but does not cleanly exit if there is a managed thread (not the main thread);

3.application.exitthread (); Force abort all messages on the calling thread, as well as the problem that other threads cannot exit correctly;

4.system.environment.exit (0); This is the most thorough exit method, no matter what threads are forced to quit, the program ends very clean.

C # Exit Program method