Actually, I didn't read closely enough, you wanted to catch the rest as well.

\b(?<Begin>[A-Z]\w+'?\w)(?<Rest>.+)?

---

John Grove - TFD Group, Senior Software Engineer, EI Division, http://www.tfdg.com

Thanks for the replys but none of the regexes above worked. A sentence ends with a period and each sentence does have its own line. Your regex was capturing "Microsoft's Products are the best products in the " and "Microsoft Developer Network has many helpful links including " in the first group.
I wanted to get only the words that start with an uppercase in the group1, meaning get the "Microsoft's Products" or the "Microsoft Developer Network" and on the other group2 get the "are the best products" or "has many helpful links including support991, downloads, forums" without including "in the market". I am trying to play around with your regexes but no luck till now.

Thank you for your help.

group1: Microsoft's Products 
group2: are the best products in the market.

group1: Microsoft Developer Network 
group2: has many helpful links including support991, downloads, forums in the market.

First a couple of questions:
What defines a sentence?
Is it a period at the end of a string of characters?
Is each sentence on it's own line?

Assuming that each sentence is on it's own line then you can use some nesting to achieve what you're looking for. See the following:

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Text.RegularExpressions;



namespace TestingRegex

{

    class Program

    {

        static void Main(string[] args)

        {

            string test = @"Microsoft's Products are the best products in the market.

Microsoft Developer Network has many helpful links including support991, downloads, forums in the market.";



            Regex regex = new Regex(@"^(?<group1>(?:[A-Z][\w']+ )+)(?<group2>.+)$", RegexOptions.Multiline);



            MatchCollection matches = regex.Matches(test);



            foreach (Match match in matches)

            {

                Console.Write("group1: ");

                Console.WriteLine(match.Groups["group1"]);



                Console.Write("group2: ");

                Console.WriteLine(match.Groups["group2"]);



                Console.WriteLine();

            }

        }

    }

}

---

Jerry Schulist

Please remember to mark replies which answer your question as answers and vote for replies which are helpful.

By the way what is the best site to learn regexes?

The regex I provided worked just fine for me:

            System.Text.RegularExpressions.Regex regextest =

                new System.Text.RegularExpressions.Regex(@"(?<group1>(([A-Z].*?(?=\x20[^A-Z]))+?))(?<group2>(.*?(?=\x20(in\x20the\x20market\.))))");;

            string test1 = @"Microsoft's Products are the best products in the market.";

            string test2 = @"Microsoft Developer Network has many helpful links including support991, downloads, forums in the market.";



            System.Text.StringBuilder outVal = new System.Text.StringBuilder();

            foreach (System.Text.RegularExpressions.Match hold in regextest.Matches(test1))

                outVal.AppendLine("group1 \"" + hold.Groups["group1"].Value + "\" / group2 \"" + hold.Groups["group2"].Value + '"');



            outVal.AppendLine("--------------End of Test 1------------------");



            foreach (System.Text.RegularExpressions.Match hold in regextest.Matches(test2))

                outVal.AppendLine("group1 \"" + hold.Groups["group1"].Value + "\" / group2 \"" + hold.Groups["group2"].Value + '"');



            MessageBox.Show(outVal.ToString());

Hey Klevis, try Expresso. And it is free! You will have to register it, but it is free.

---

John Grove - TFD Group, Senior Software Engineer, EI Division, http://www.tfdg.com

I just checked the site and it looks great. I also tried RegexBuddy to test your expression and surprisingly it didnt work. Probably I haven't checked the right options. But anywat thanks again for the solution. Keep up the good work.

-Klevis

I just checked the site and it looks great. I also tried RegexBuddy to test your expression and surprisingly it didnt work. Probably I haven't checked the right options. But anywat thanks again for the solution. Keep up the good work.

-Klevis

Not sure why that would happen, see this screenshot .

---

Jerry Schulist

Please remember to mark replies which answer your question as answers and vote for replies which are helpful.