Question

Possible Duplicate:
why can't we define a variable inside a while loop?

I would like to simplify the following code:

string line;
while ((line = sr.ReadLine()) != null)

into:

while ((string line = sr.ReadLine()) != null)

but failed.

However, we surely can do this in for:

for (int i=0, int n=50;i<n;i++)

Answer 1

You can still use for:

for (string line; (line = sr.ReadLine()) != null; )
    ...