Save user prefs to registry : Registry Save : Windows C# Examples

    
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\\YourSoftwareName\\SubDomain");
        regKey.SetValue("CurrSize",  10);
        regKey.SetValue("CurrColor",  "Blue");
      }
}