Hi,

I have a small algorithm which replaces the position of characters in a String:

class Program
{
    static void Main(string[] args)
    {
        String pairSwitchedStr = pairSwitch("some short sentence");
        Console.WriteLine(pairSwitchedStr);

        Console.ReadKey();
    }

    private static String pairSwitch(String str)
    {
        StringBuilder pairSwitchedStringBuilder = new StringBuilder();
        for (int position = 0; position + 1 < str.Length; position += 2)
        {
            pairSwitchedStringBuilder.Append((char)str[position + 1]);
            pairSwitchedStringBuilder.Append((char)str[position]);
        }
        return pairSwitchedStringBuilder.ToString();
    }
}

I would like to make it as generic as possible, possibly using Generics. What I'd like to have is something which works with:

• Anything that is built up using a list of instances.
• Including strings, arrays, linked lists

I suspect that the solution must use generics as the algorithm is working on a list of instances of T (there T is ... something). Version of C# isn't of interest, I guess the solution will be nicer if features from C# version >2.0 is used.