// Source code accompanied with the "Working with Registry in C#" article/tutorial
// Author: Barzan "Tony" Antal
using System;
using Microsoft.Win32;

namespace registry
{
    class Program
    {
        static void Main(string[] args)
        {
            // beginning of first example
            RegistryKey regkey = Registry.CurrentUser; // create our object
            regkey = regkey.OpenSubKey("Software\\Tutorial"); // open our subkey [read-only]
            if (regkey == null) // error handling
            {
                Console.WriteLine("Couldn't open the desired subkey.");
                return;
            }
            string[] valnames = regkey.GetValueNames(); // retrieve the value names
            int i = 0;
            foreach (string s in valnames) // for each value name retrieve its data
            {
                string val = (string)regkey.GetValue(valnames[i++]); 
                Console.WriteLine(s + " contains " + val); // print them out
            }
            Console.WriteLine("\t");
            regkey.Close(); // close our object
            // end of first example

            // beginning of second example
            regkey = Registry.CurrentUser; // create our object 
            regkey = regkey.CreateSubKey("Software\\Tutorial\\NewSubKey"); // create and open new subkey
            regkey.SetValue("TestValueName", "Our Value"); // create new value
            regkey.SetValue("AnotherTestValue", "Second Value"); // create new value
            valnames = regkey.GetValueNames(); // retrieve the value names
            i = 0;
            foreach (string s in valnames) // for each value name retrieve its data
            {
                string val = (string)regkey.GetValue(valnames[i++]);
                Console.WriteLine(s + " contains " + val); // print them out
            }
            Console.WriteLine("\t");
            regkey.Close(); // close our object
            // end of second example

            // beginning of third example
            regkey = Registry.CurrentUser; // create our object
            regkey = regkey.OpenSubKey("Software\\Tutorial", true); // open our subkey [writable=true]
            if (regkey == null) // error handling
            {
                Console.WriteLine("Couldn't open the desired subkey.");
                return;
            }
            regkey.SetValue("DS", "Edited Dev Shed"); // we modify the DS existing value
            regkey.Flush(); // we flush our object
            valnames = regkey.GetValueNames(); // retrieve the value names
            i = 0;
            foreach (string s in valnames) // for each value name retrieve its data
            {
                string val = (string)regkey.GetValue(valnames[i++]);
                Console.WriteLine(s + " contains " + val); // print them out
            }
            Console.WriteLine("\t");
            regkey.Close(); // close our object
            // end of third example
        }
    }
}