frequency word

THANK YOU THANK YOU VERY MUCH :)

Sure we can.

Here's some revised code:

Sir,
Instead of taking a plain text as input,can we take a text file at run time and execute the code given
above?
If so,what is the procedure or code required?
And thank you so much for providing us the code.

In principle you can count the words in a piece of text using C# and LINQ as follows:

using System;
using System.Linq;
using System.Text.RegularExpressions;

class Test
{
   static void Main()
   {
      string text = "The quick brown fox jumps over the quick lazy dog and the quick brown cat";
      MatchCollection mc = Regex.Matches(text, @"\b\w+\b");
      var query = from Match m in mc group m by m.Value.ToLower() into g select new {Word = g.Key, Frequency = g.Count()};

      foreach(var item in query)
      {
         Console.WriteLine("{0} : {1}", item.Word, item.Frequency);
      }

      Console.ReadKey(); 
   }
}      

A 'word' for this purpose can only consist of the characters: a-z, A-Z, 0-9 or underscore but can be easily changed to include other characters.

The output of the above program should be:

the : 3
quick : 3
brown : 2
fox : 1
jumps : 1
over : 1
lazy : 1
dog : 1
and : 1
cat : 1