C#

using System;<br />
using System.Collections.Generic;<br />
using System.Linq;<br />
using System.Text;<br />
<br />
namespace ConsoleApplication1<br />
{<br />
    class Program<br />
    {<br />
        static void Main(string[] args)<br />
        {<br />
            string _givenString = "wvtnfhxyz1hdxyz1fdxyz1ejxyz1dhxyz1dxyz1eeaa1oeys";<br />
            Dictionary<string, int> _codes = new Dictionary<string, int>();<br />
            int _startingPoint = 0;<br />
            while (_startingPoint < _givenString.Length)<br />
            {<br />
                for (int j = 2; j < _givenString.Length; j++)<br />
                {<br />
                    for (int i = _startingPoint; i < _givenString.Length && i + j < _givenString.Length; i++)<br />
                    {<br />
                        if (!_codes.ContainsKey(_givenString.Substring(i, j)))<br />
                        {<br />
                            _codes.Add(_givenString.Substring(i, j), 1);<br />
                        }<br />
                        else<br />
                        {<br />
                            _codes[_givenString.Substring(i, j)] += 1;<br />
                        }<br />
                    }<br />
                }<br />
                <br />
                _startingPoint++;<br />
            }<br />
<br />
            List<KeyValuePair<string, int>> _sortedCodes = SortDictionary(_codes);<br />
            for (int i = 0; i < 5; i++)<br />
            {<br />
                Console.WriteLine(_sortedCodes[i].Key + " : " + _sortedCodes[i].Value + " times");<br />
            }<br />
            Console.ReadKey();<br />
        }<br />
<br />
        public static List<KeyValuePair<string, int>> SortDictionary(Dictionary<string, int> data)<br />
        {<br />
            List<KeyValuePair<string, int>> result =<br />
                  new List<KeyValuePair<string, int>>(data);<br />
            result.Sort(<br />
              delegate(<br />
                KeyValuePair<string, int> first,<br />
                KeyValuePair<string, int> second)<br />
              {<br />
                  return second.Value.CompareTo(first.Value);<br />
              }<br />
              );<br />
            return result;<br />
        }<br />
    }<br />
}

1. Keep a string:int dictionary of substring:count

2. Loop through each character:
  a. Looping from 2 to your maximum substring size (Say, 5)
    i.  Grab the substring of that length from the current position
    ii. Add/increment it in the dictionary

3. Look through the dictionary keys:
  a. See if the key is a substring of any other keys, with an equal count... If so, just delete this key.

Anindya Chatterjee wrote:

how would I redirect the console input output to a textbox or richtextbox?

Console.WriteLine("Hello World");

/// <summary>
/// This function returns a <see cref="System.Single"/>
/// </summary>
public float MyFunction()
{
    // your code
}

this.SetStyle (ControlStyles.DoubleBuffer, true);

private const int WM_ENTERSIZEMOVE = 0x0231;
private const int WM_EXITSIZEMOVE = 0x0232;

protected override void WndProc(ref Message m)
{
    base.WndProc(ref m);

    switch (m.Msg)
    {
        case WM_ENTERSIZEMOVE:
            this.Opacity = 0.5;
            break;
        case WM_EXITSIZEMOVE:
            this.Opacity = 1.0;
            break;
    }

    this.Invalidate();
}

The only programmers that are better C# programmers, are those who look like this ->

Programm3r
My Blog: ^_^