Csharp/C Sharp by API/Microsoft.Win32/Registry

Registry.CurrentUser

 
using System;
using System.Drawing;
using System.Collections;
using System.ruponentModel;
using System.Windows.Forms;
using System.Data;
using Microsoft.Win32;
using System.Diagnostics;
public class MainClass{
   public static void Main(){
    RegistryKey regKey = Registry.CurrentUser;
    regKey = regKey.CreateSubKey("Software\\YourCompanyName\\SubDomainName");
    int currFontSize = (int)regKey.GetValue("CurrSize", 12);
    string c = (string)regKey.GetValue("CurrColor", "defaultName");
    
   }
}

Registry.GetValue

 
using System;
using Microsoft.Win32;
class MainClass
{
    public static void Main(String[] args)
    {
        int Count = (Int32)Registry.GetValue(
                @"HKEY_CURRENT_USER\Software\CompanyName\SoftwareName",
                "Count", 0); // 0 is the default value
    }
}

Registry.LocalMachine

 

using System;
using Microsoft.Win32;
class MainClass
{
    public static void Main()
    {
      RegistryKey start = Registry.LocalMachine;
      RegistryKey cardServiceName, networkKey;
      string networkcardKey = "SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\NetworkCards";
      string serviceKey = "SYSTEM\\CurrentControlSet\\Services\\";
      string networkcardKeyName, deviceName, deviceServiceName, serviceName;
    
      RegistryKey serviceNames = start.OpenSubKey(networkcardKey);
      if (serviceNames == null)
      {
          Console.WriteLine("Bad registry key");
          return;
      }
    
      string[] networkCards = serviceNames.GetSubKeyNames();
      serviceNames.Close();
    
      foreach(string keyName in networkCards)
      {
          networkcardKeyName = networkcardKey + "\\" + keyName;
          cardServiceName = start.OpenSubKey(networkcardKeyName);
          if (cardServiceName == null)
          {
            Console.WriteLine("Bad registry key: {0}", networkcardKeyName);
            return;
          }
          deviceServiceName = (string)cardServiceName.GetValue("ServiceName");
          deviceName = (string)cardServiceName.GetValue("Description");
          Console.WriteLine("\nNetwork card: {0}", deviceName);
      }
    
      start.Close();
    }
}

Registry.SetValue

 
using System;
using Microsoft.Win32;
class MainClass
{
    public static void Main(String[] args)
    {
        Registry.SetValue(
            @"HKEY_CURRENT_USER\Software\CompanyName\SoftwareName",
            "IntValueName", 101, RegistryValueKind.DWord);
    }
}