using System;
using System.Text.RegularExpressions;
class Program {
static void Main()    {
string ourString = @"one-two-three:uno-dos-tres one-two-three:ichi-ni-san";
string ourPattern = @"(?:(?<someword>\w+)-?)+:(?:(?<someword>\w+)-?)+";
var ourRegex = new Regex(ourPattern);
MatchCollection AllMatches = ourRegex.Matches(ourString);
 
Console.WriteLine("**** Understanding Named Capture Reuse ****");
Console.WriteLine("\nOur string today is:" + ourString);
Console.WriteLine("Our regex today is:" + ourPattern);
Console.WriteLine("Number of Matches: " + AllMatches.Count);
 
Console.WriteLine("\n*** Let's Iterate Through the Matches ***");
int matchNum = 1;
foreach (Match SomeMatch in AllMatches)    {
    Console.WriteLine("Match number: " + matchNum++);
    Console.WriteLine("Overall Match: " + SomeMatch.Value);
    Console.WriteLine("\nNumber of Groups: " + SomeMatch.Groups.Count);
    Console.WriteLine("Why two Groups, not one? Because the overall match is Group 0");
    // Another way of printing the overall match
    Console.WriteLine("Groups[0].Value = " + SomeMatch.Groups[0].Value);
    Console.WriteLine(@"Since the 'someword' group appears more than once in the pattern, the value of Groups[1] and Groups[""someword""] is the last capture of each group");
    Console.WriteLine("Groups[1].Value = " + SomeMatch.Groups[1].Value);
    Console.WriteLine(@"Groups[""someword""].Value = " + SomeMatch.Groups["someword"].Value);
    // Let's look all the first captures manually
    Console.WriteLine("Someword Capture 0: " + SomeMatch.Groups["someword"].Captures[0].Value);
 
// Let's look at someword captures automatically
    int somewordCapCount = SomeMatch.Groups["someword"].Captures.Count;
    Console.WriteLine("Number of someword Captures: " + somewordCapCount);
    int i2 = 0;
    foreach (Capture someword in SomeMatch.Groups["someword"].Captures)    {
        Console.WriteLine("someword Capture " + i2 + ": " + someword.Value);
    i2++;
    } // end iterate G2 captures
    Console.WriteLine("\n");
} // end iterate matches
 
Console.WriteLine("\nPress Any Key to Exit.");
Console.ReadKey();
 
} // END Main
} // END Program

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