string[] colors = { "green", "brown", "blue", "red" }; What's the output from the following? var query = from c in colors where c.Length == colors.Max (c => c.Length) select c; foreach (var element in query) Console.WriteLine (element);

159.

string[] colors = { "green", "brown", "blue", "red" };

What's the output from the following?

var query =
from c in colors
where c.Length == colors.Max (c => c.Length)
select c;

foreach (var element in query)
Console.WriteLine (element);

green followed by brown

5 followed by 5

Compile-time error

Exception is thrown

The variable, c, inside the subquery, conflicts with the outer query's iteration variable, so the compiler complains. Here's how to fix it:

var query =
from c in colors
where c.Length == colors.Max (c2 => c2.Length)
select c;

The answer is then (green followed by brown).