/// <summary>
        /// 注册表帮助类
        /// 从读、写、删除、判断
        /// 四个方面实现对注册表的简单操作
        /// </summary>
        public class RegeditHelper
        {
                /// <summary>
                /// 读取指定名称的注册表的值
                /// 读取的注册表中HKEY_LOCAL_MACHINE\SOFTWARE目录下的XXX目录中名称为name的注册表值
                /// </summary>
                /// <param name="name">注册名称</param>
                /// <param name="parentKeyName">要打开的子项的名称或路径</param>
                /// <returns></returns>
                public static object GetRegistData(string name, string parentKeyName = "SOFTWARE")
                {
                        try
                        {
                                RegistryKey hkml = Registry.LocalMachine;
                                RegistryKey software = hkml.OpenSubKey(parentKeyName, true);
                                var registData =http://www.mamicode.com/ software.GetValue(name);
                                hkml.Close();
                                return registData;
                        }
                        catch (Exception ex)
                        {
                                return "System Exceptions:" + ex.Message;
                        }
                }

                /// <summary>
                /// 向注册表中写数据 
                /// 在注册表中HKEY_LOCAL_MACHINE\SOFTWARE目录下新建XXX目录并在此目录下创建名称为name值为tovalue的注册表项
                /// </summary>
                /// <param name="name">注册表名称</param>
                /// <param name="tovalue">值</param>
                /// <param name="parentKeyName">要打开的子项的名称或路径</param>
                public static void WriteRegedit(string name, object tovalue, string parentKeyName = "SOFTWARE")
                {
                        try
                        {
                                RegistryKey hklm = Registry.LocalMachine;
                                RegistryKey software = hklm.OpenSubKey(parentKeyName,true);
                                software.SetValue(name, tovalue);
                                hklm.Close();
                        }
                        catch (Exception ex)
                        {
                                return;
                        }
                }
                /// <summary>
                /// 更新注册表项
                /// </summary>
                /// <param name="name">键</param>
                /// <param name="tovalue">值</param>
                /// <param name="parentKeyName">父级名称</param>
                public static void UpdateRegedit(string name, string tovalue, string parentKeyName = "SOFTWARE")
                {
                        try
                        {
                                RegistryKey hklm = Registry.LocalMachine;
                                RegistryKey software = hklm.OpenSubKey(parentKeyName, true);
                                software.SetValue(name, tovalue);
                hklm.Flush();
                                hklm.Close();
                        }
                        catch (Exception ex)
                        {
                                return;
                        }
                }
                /// <summary>
                /// 创建子项
                /// </summary>
                /// <param name="name">子项名称</param>
                /// <param name="parentKeyName">子项的父级</param>
                public static void CreateRegistItem(string name, string parentKeyName = "SOFTWARE")
                {
                        try
                        {
                                RegistryKey hklm = Registry.LocalMachine;
                                //RegistryKey software = hklm.CreateSubKey(parentKeyName + "\\" + name, RegistryKeyPermissionCheck.ReadWriteSubTree);
                                RegistryKey software = hklm.OpenSubKey(parentKeyName,true);
                                software.CreateSubKey(name);
                                hklm.Flush();
                                hklm.Close();
                        }
                        catch (Exception ex)
                        {
                                return;
                        }
                }
              
                /// <summary>
                /// 删除注册表中指定的注册表项 
                /// 在注册表中HKEY_LOCAL_MACHINE\SOFTWARE目录下XXX目录中删除名称为name注册表项
                /// </summary>
                /// <param name="name">注册表名称</param>
                /// <param name="parentKeyName">要打开的子项的名称或路径</param>
                public static void DeleteRegist(string name, string parentKeyName = "SOFTWARE")
                {
                        try
                        {
                                RegistryKey hkml = Registry.LocalMachine;
                                RegistryKey software = hkml.OpenSubKey(parentKeyName, true);
                                var aimnames = software.GetSubKeyNames();
                                foreach (string aimKey in aimnames)
                                {
                                        if (aimKey == name)
                                                software.DeleteSubKeyTree(name);
                                }
                                hkml.Close();
                        }
                        catch (Exception ex)
                        {
                                return;
                        }
                }
                /// <summary>
                /// 判断指定注册表项是否存在
                /// 在注册表中HKEY_LOCAL_MACHINE\SOFTWARE目录下XXX目录中判断名称为name注册表项是否存在
                /// 这一方法在删除注册表时已经存在
                /// 在新建一注册表项时也应有相应判断
                /// </summary>
                /// <param name="name">注册表名称</param>
                /// <param name="parentKeyName">要打开的子项的名称或路径</param>
                /// <returns></returns>
                public static bool IsRegeditKeyExit(string name, string parentKeyName = "SOFTWARE")
                {
                        try
                        {
                                RegistryKey hkml = Registry.LocalMachine;
                                RegistryKey software = hkml.OpenSubKey(parentKeyName, true);
                                var subkeyNames = software.GetValueNames();
                                foreach (string keyName in subkeyNames)
                                {
                                        if (keyName.ToUpper() == name.ToUpper())
                                        {
                                                hkml.Close();
                                                return true;
                                        }
                                }
                                hkml.Close();
                                return false;
                        }
                        catch (Exception ex)
                        {
                                return false;
                        }
                }


                /// <summary>
                /// 判断是否存在子节点
                /// </summary>
                /// <param name="name">注册表子节点名称</param>
                /// <param name="parentKeyName">要打开的子项的名称或路径</param>
                /// <returns></returns>
                public static bool IsRegeditItemExit(string name, string parentKeyName = "SOFTWARE")
                {
                        try
                        {
                                RegistryKey hkml = Registry.LocalMachine;
                                RegistryKey software = hkml.OpenSubKey(parentKeyName, true);
                                var subkeyNames = software.GetSubKeyNames();
                                foreach (string keyName in subkeyNames)
                                {
                                        if (keyName.ToUpper() == name.ToUpper())
                                        {
                                                hkml.Close();
                                                return true;
                                        }
                                }
                                hkml.Close();
                                return false;
                        }
                        catch (Exception ex)
                        {
                                return false;
                        }
                } 

        }