Sorting strings (C#).

Well, it's easy enough if the strings in the array are only one character in length:

     string[] a = { "3", "2", "5", "4", "1" };
     string t;

     for (int p = 0; p <= a.Length - 2; p++)
     {
        for (int i = 0; i <= a.Length - 2; i++)
        {
           if (a[i][0] > a[i + 1][0])
           {
              t = a[i + 1];
              a[i + 1] = a[i];
              a[i] = t;
           }
        }
     }

     foreach (string aa in a)
       Console.Write(aa + " ");

However, if the strings are of any length, then you'd need to write your own equivalent of the CompareTo method as strings in C# don't support the '>' operator even for strictly lexical comparisons.