Didn't understand something

Question

What is the output of this code?
int a = 4;
int b = 6;
b = a++;
Console.WriteLine(++b);

The answer is 5, But I don't understand why it's that

Answer 1

Calvin's answer doesn't really explain why.

The increment operator (++) increases the value by one, but depending which side it's on changes whether the increment happens before or after the value is acted on. (evaluated, assigned, etc.)

This is what A++ actually does:
int B = A;
A = A + 1;

This is what ++A does.
A = A + 1;
int B = A;
Or in a single line:
int B = (A = A + 1);

Answer 2

b is 4 after b=a++;
b is 5 after ++b

Answer 3

Thanks really helped me out

Answer 4

It's still hard to understand at sometimes :D.