using System;

using System.Linq;

using System.Text;

using System.Collections.Generic;

public class Program

{

    public static void Main()

    {

        string[] names = new string[6];

        names[0] = "Person 1";

names[1] = "Person 2";

names[2] = "Person 3";

names[3] = "Person 4";

names[4] = "Person 5";

names[5] = "Person 6";

​

var result = Enumerable.Range(0, names.Length / 3)

                       .Select(i => new string[] { names[i], names[i+1], names[i+2] })

                       .ToArray();

        StringBuilder sb = new StringBuilder();

        sb.AppendLine("[My Windows Form. . . . . . . . . . . . . . . . [X]]");

        sb.AppendLine("|GROUP A | GROUP B | GROUP C|");

        foreach (var item in result)

        {

            sb.AppendLine("|{" +item[0] + "}|{" + item[1] + "}|{" + item[2] + "}");

        }

​

        Console.WriteLine(sb.ToString());

    }

}