What does += means? And why we use it?

Answer 1

Why not to use x=x+y
than to use x+=y

Answer 2

It reduces the amount of code needed. There are allot of ways to shorten your syntax when coding in C#, it all adds up with bigger projects!

It can result in smaller file sizes, quicker applications, and easier to read code.

Answer 3

It's called as shorthand, it makes code easy and short

Answer 4

there are no real rules about wich one to use when. it Has more to do with readability.