Microsoft Win32 C# by API

using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
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");
    
   }
}