Can you reverse order a string in one line with LINQ or a LAMBDA expression

Question

Not that I would want to use this practically (for many reasons) but out of strict curiousity I would like to know if there is a way to reverse order a string using LINQ and/or LAMBDA expressions in one line of code, without utilising any framework "Reverse" methods.

e.g.

string value = "reverse me";
string reversedValue = (....);

and reversedValue will result in "em esrever"

EDIT Clearly an impractical problem/solution I know this, so don't worry it's strictly a curiosity question around the LINQ/LAMBDA construct.

Answer 1

Well, I can do it in one very long line, even without using LINQ or a lambda:

string original = "reverse me"; char[] chars = original.ToCharArray(); char[] reversed = new char[chars.Length]; for (int i=0; i < chars.Length; i++) reversed[chars.Length-i-1] = chars[i]; string reversedValue = new string(reversed);

(Dear potential editors: do not unwrap this onto multiple lines. The whole point is that it's a single line, as per the sentence above it and the question.)

However, if I saw anyone avoiding using framework methods for the sake of it, I'd question their sanity.

Note that this doesn't use LINQ at all. A LINQ answer would be:

string reverseValue = new string(original.Reverse().ToArray());

Avoiding using Reverse, but using OrderByDescending instead:

string reverseValue = new string(original.Select((c, index) => new { c, index })
                                         .OrderByDescending(x => x.index)
                                         .Select(x => x.c)
                                         .ToArray());

Blech. I like Mehrdad's answer though. Of course, all of these are far less efficient than the straightforward approach.

Oh, and they're all wrong, too. Reversing a string is more complex than reversing the order of the code points. Consider combining characters, surrogate pairs etc...