How does a lambda in C# bind to the enumerator in a foreach?

Question

I just came across the most unexpected behavior. I\'m sure there is a good reason it works this way. Can someone help explain this?

Consider this code:

Answer 1

Since the foreach construct is just syntactic sugar it is best to think of it in it's true form.

int num;
while (nums.MoveNext())
{
    num = nums.Current;
    actions.Add(() => num);
}

The lambda will capture the num variable so when you execute the lambda the latest value of num will be used.