Resharper: vars

Question

Why does Resharper want you to change most variables to var type instead of the actual type in the code?

Answer 1

For me, it is definitely worth the price...(even if I had to pay it myself). But it can slow down your VS. It can get really slow if you have files like 5000 lines of code.

What I still don't get however is why I am the only one in the team using it...