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C# C# Objects Encapsulation with Properties Properties

Why is the code `` location = invader.Location; needed `` when earlier code had set the Location field to location?

In 3:41 of the video, the code already has

invader.Location = location;

before adding

location = invader.Location;

The presenter says this second statement "gets the location from the invader and sets it back into the local variable location." I am not quite clear on why this second statement is needed if the invader.Location = location; already exists. Per the video on Fields (link)[https://teamtreehouse.com/library/fields] the first statement already used dot notation to allow us to access the Location field and it was set to location.

Am I missing something?