Reverse of a String without using String Reverse Function-Alternate Tips

In alternate of This tips-[ http://www.dotnetfunda.com/codes/code1684-reverse-of-a-string-without-using-string-reverse-function.aspx ]
we have various ways to use Reverse a string without using any function.
take a look at given ways

Way 1 :-its better to using LINQ

public static string ReverseString(string str)
        {
                      return new string(Enumerable.Range(1, str.Length).Select(i => str[str.Length - i]).ToArray());
        }

Ways 2: - Using bitwise XOR

public static string ReverseXor(string s)
{
    char[] charArray = s.ToCharArray();
    int len = s.Length - 1;
    for (int i = 0; i < len; i++, len--)
    {
        charArray[i] ^= charArray[len];
        charArray[len] ^= charArray[i];
        charArray[i] ^= charArray[len];
    } 
    return new string(charArray);
}

Ways 3:- recursive approach

 private static string Reverse(string str)
{
   if (str.Length == 1)
       return str;
   else
       return str[str.Length - 1] + Reverse(str.Substring(0, str.Length - 1));
}

Way 4 :- flexible way

public static string Reverse(string x)
{
    char[] charArray = new char[x.Length];
    int len = x.Length - 1;
    for (int i = 0; i <= len; i++)
       charArray[i] = x[len - i];
    return new string(charArray);
}

apart of all these method I will recommend myself to use Array.Reverse() function and LINQ

string str = "12345";

            char[] charr = str.ToCharArray();

            for (int i = 0; i < charr.Length/2; i++)

            {

                char ctemp = charr[i];

                charr[i] = charr[charr.Length - 1 - i];

                charr[charr.Length - 1 - i] = ctemp;

            }

            str=new string(charr);