using System;
using System.Text.RegularExpressions;


class MatchingApp {
    static void Main(string[] args) {
        Regex r = new Regex("in");
        Match m = r.Match("Matching");
        if (m.Success) {
            Console.WriteLine("Found '{0}' at position {1}",m.Value, m.Index);
        }
    }
}

    

   
 

using System;
using System.Text.RegularExpressions;


public class MainClass {
    public static void Main() {
        string x = "Once Upon A Time In America";
        Regex m = new Regex("( )");
        foreach (string ss in m.Split(x)) {
            Console.WriteLine(ss);
        }
    }
}

    

   
 

using System;
using System.Text.RegularExpressions;


public class MainClass {
    public static void Main() {
        string x = "Once Upon A Time In America";
        Regex m = new Regex("( )");
        foreach (string ss in m.Split(x)) {
            Console.WriteLine(ss);
        }
    }
}

    

   
 

using System;
using System.Text.RegularExpressions;


public class MainClass {
    public static void Main() {
        string v = "Once   Upon A Time In   America";
        Regex o = new Regex(@"[s]+");
        foreach (string ss in o.Split(v)) {
            Console.WriteLine(ss);
        }
    }
}

    

   
 

using System;
using System.Text.RegularExpressions;


public class MainClass {
    public static void Main() {

        string u = "Once   Upon A Time In   America";
        Regex p = new Regex(" ");
        foreach (string ss in p.Split(u)) {
            if (ss.Length > 0)
                Console.WriteLine(ss);
        }
    }
}

    

   
 

using System;
using System.Text.RegularExpressions;


public class MainClass {
    public static void Main() {
        string t = "Once,Upon:A/TimeIn'America";
        Regex q = new Regex(@" |,|:|/||'");
        foreach (string ss in q.Split(t)) {
            Console.WriteLine(ss);
        }
    }
}

    

   



using System;
using Microsoft.Win32;


class MainClass {
    public static void SearchSubKeys(RegistryKey root, String searchKey) {
        foreach (string keyname in root.GetSubKeyNames()) {
            try {
                using (RegistryKey key = root.OpenSubKey(keyname)) {
                    if (keyname == searchKey) PrintKeyValues(key);
                    SearchSubKeys(key, searchKey);
                }
            } catch (System.Security.SecurityException) {
            }
        }
    }

    public static void PrintKeyValues(RegistryKey key) {
        Console.WriteLine("Registry key found : {0} contains {1} values",
            key.Name, key.ValueCount);
        foreach (string valuename in key.GetValueNames()) {
            if (key.GetValue(valuename) is String) {
                Console.WriteLine(" Value : {0} = {1}",
                    valuename, key.GetValue(valuename));
            }
        }
    }

    public static void Main(String[] args) {
        if (args.Length > 0) {
            using (RegistryKey root = Registry.CurrentUser) {
                SearchSubKeys(root, args[0]);
            }
        }
    }
}