In "Richard Cory" what is the meaning of "irony of situation" in the poem?

Situationalis created
when something happens, often to someone, that is the opposite of what we would expect to
happen. For example, the firehouse burning down or a police officer getting robbed would be
typical examples of situational irony. We would not expect the firehouse to burn down because
the fire fighters and all their equipment are there, and because its burning defies expectation
in such a significant way, situational irony is created. The poem, " ," presents an
individual who seems to have it all, and we would, therefore, expect him to be very happy and
contented with his life. However, instead of being happy, Cory must be tragically unhappy
because he takes his own life. He is described as "a gentleman from sole to crown, / Clean
favored, and imperially slim." He has perfect manners and charm, and he even looks rather
regal. He actually "fluttered pulses" when he speaks to people and "glittered
when he walked." In other words, he must be extremely...