What is the scope of the counter variable in a for loop?

Question

I get the following error in Visual Studio 2008:

Error 1 A local variable named \'i\' cannot be declared in this scope because it would give a different meaning

Answer 1

The incrementor does not exist after the for loop.

for (int i = 0; i < 10; i++) { }
int b = i; // this complains i doesn't exist
int i = 0; // this complains i would change a child scope version because the for's {} is a child scope of current scope

The reason you can't redeclare i after the for loop is because in the IL it would actually declare it before the for loop, because declarations occur at the top of the scope.