Checkpoint in c#

Hello there! I have a question.

How can I do a checkpoint component that will cause the player to pass through when updating the position at which the player will reappear [respawn] to die (all within the execution of the game, you will not save a file in that position to load the start a new game). Ideally, the checkpoints will be numbered, so that if for example we have activated the 3 and turn to go through the 2, this will not be activated, but prevail 3.

THANK YOU SO MUCH