private void WTRegedit(string name,string tovalue) 

{ 

   RegistryKey hklm = Registry.LocalMachine; 

   RegistryKey software = hklm.OpenSubKey("SOFTWARE",true); 

   RegistryKey aimdir = software.CreateSubKey("XXX"); 

   aimdir.SetValue(name,tovalue); 

} 

private void DeleteRegist(string name) 

{ 

string[] aimnames; 

   RegistryKey hkml = Registry.LocalMachine; 

   RegistryKey software = hkml.OpenSubKey("SOFTWARE",true); 

   aimnames = software.GetSubKeyNames(); 

foreach(string aimKey in aimnames) 

   { 

if(aimKey == name) 

        aimdir.DeleteSubKeyTree(name); 

   } 

} 

RegistrySecurity rsy = new RegistrySecurity();

     RegistryAccessRule rar=new RegistryAccessRule(Environment.UserDomainName+
"\\"+Environment.UserName,RegistryRights.ReadKey|RegistryRights.WriteKey|
                RegistryRights.Delete,InheritanceFlags.ContainerInherit,PropagationFlags.None,
                AccessControlType.Allow);

     rsy.AddAccessRule(rar);

     RegistryKey cu = Registry.CurrentUser;

     RegistryKey rk = cu.CreateSubKey("test1", RegistryKeyPermissionCheck.ReadWriteSubTree, rsy);

     RegistryKey rky = rk.CreateSubKey("test2",RegistryKeyPermissionCheck.ReadWriteSubTree);

     cu.DeleteSubKeyTree("test1");