Given a string, swap the case for each of the letters.

e.g. CodEwArs --> cODeWaRS

Examples

Kata.Swap("") == ""

Kata.Swap("CodeWars") == "cODEwARS"

Kata.Swap("abc") == "ABC"

Kata.Swap("ABC") == "abc"

Kata.Swap("123235") == "123235"

using System;

using System.Linq;

public static class Kata

{

 public static string Swap(string str)

        {

            return string.Join(string.Empty, str.Select(character => char.IsLower(character) ? char.ToUpper(character) : char.IsUpper(character) ? char.ToLower(character) : character));

        }

        //public static string Swap(string str)

        //{

        //    str = string.Join(string.Empty, str.Select(Selector));

        //    return str; //your code here

        //}

        //public static char Selector(char character)

        //{

        //    char tempCharacter = character;

        //    if (char.IsLower(character))

        //    {

        //        tempCharacter = char.ToUpper(character);

        //    }

        //    else if (char.IsUpper(character))

        //    {

        //        tempCharacter = char.ToLower(character);

        //    }

        //    return tempCharacter;

        //}

}

using System;

using System.Linq;

public static class Kata {

  public static string Swap(string str) {

    return String.Concat(str.Select(c => Char.IsUpper(c) ? Char.ToLower(c) : Char.ToUpper(c)));

  }

}