Question

The error is

The best overloaded method match for ‘string.String(char[])’ has some invalid arguments

My code:

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

Answer 1

char[] chars = value.ToCharArray();
Array.Reverse(chars);
new String(chars);

Or (somewhat slower)

new String(value.Reverse().ToArray());

Note that this won’t handle UTF32 surrogate pairs, nor combining characters.