Use of var keyword in C#

Answer 1

I only use var when it's clear to see what type is used.

For example, I would use var in this case, because you can see immediately that x will be of the type "MyClass":

var x = new MyClass();

I would NOT use var in cases like this, because you have to drag the mouse over the code and look at the tooltip to see what type MyFunction returns:

var x = MyClass.MyFunction();

Especially, I never use var in cases where the right side is not even a method, but only a value:

var x = 5;

(because the compiler can't know if I want a byte, short, int or whatever)