C # class to the system registry operations

the System the using;
the using the System.Collections.Generic;
the using the System.Text;
the using the Microsoft.Win32; // registry operation
using System.Collections; // use Arraylist
the using the System.Security.Cryptography; // encryption and decryption
using System.IO ; // file operations
using System.Runtime.InteropServices; // DllImport call DLL
a using the System.Management; // hardware information
using System.Net; // obtain an IP address is to use
a using the System.Drawing; // Image
a using System .Net.NetworkInformation; // ping used
using System.Text.RegularExpressions; // regular
a using the System.Data;
a using the System.Data.SqlClient;
a using Microsoft.VisualBasic; // use the turn Simplified Traditional
the System.Web the using; HTML UrlEncode //


// registry operations
    public class GF_RegReadWrite
    {
       
        /// <Summary>
        /// read path of the keypath, key named keyname registry key, the default return DEF
        /// </ Summary>
        /// <param name = "RootKey"> </ param>
        /// <param name = "the keypath"> path </ param>
        /// <param name = "KeyName"> keys </ param>
        /// <param name = "RTN"> defaults to null </ param>
        /// <Returns> </ Returns>        
        static public BOOL GetRegVal (the RegistryKey RootKey, the keypath String, String KeyName, out string rtn)
        {
            rtn = "";
            try
            {
                RegistryKey key = rootkey.OpenSubKey(keypath);
                rtn = key.GetValue(keyname).ToString();
                key.Close();
                return true;
            }
            catch
            {
                return false;
            }
        }
     
        /// <summary>
        /// 设置路径为keypath，键名为keyname的注册表键值为keyval
        /// </summary>
        /// <param name="rootkey"></param>
        /// <param name="keypath"></param>
        /// <param name="keyname"></param>
        /// <param name="keyval"></param>
        /// <returns></returns>
        static public bool SetRegVal(RegistryKey rootkey, string keypath, string keyname, string keyval)
        {
            try
            {
                RegistryKey key = rootkey.OpenSubKey(keypath, true);
                if (key == null)
                    key = rootkey.CreateSubKey(keypath);
                key.SetValue(keyname, (object)keyval);
                key.Close();
                return true;
            }
            catch
            {
                return false;
            }
        }

        // create a bond path keypath
        Private the RegistryKey CreateRegKey (the RegistryKey RootKey, String keypath)
        {
            the try
            {
                return rootkey.CreateSubKey (keypath);
            }
            the catch
            {
                return null;
            }
        }
        /// Remove path keypath subkey
        private bool DelRegSubKey (the RegistryKey RootKey, the keypath String)
        {
            the try
            {
                rootkey.DeleteSubKey (the keypath);
                return to true;
            }
            the catch
            {
                return to false;
            }
        }
        /// remove path for the child and its subsidiary keypath children
        Private BOOL DelRegSubKeyTree (the RegistryKey RootKey, String keypath)
        {
            the try
            {
                rootkey.DeleteSubKeyTree (keypath);
                return to true;
            }
            the catch
            {
                return to false ;
            }
        }
        /// remove the path keypath key called the key keyname
        private bool DelRegKeyVal(RegistryKey rootkey, string keypath, string keyname)
        {
            try
            {
                RegistryKey key = rootkey.OpenSubKey(keypath, true);
                key.DeleteValue(keyname);
                return true;
            }
            catch
            {
                return false;
            }
        }
    }

Reproduced in: https: //www.cnblogs.com/kevinGao/archive/2011/11/04/2671035.html