strore a xml file in registry and after restore it - asp.net

Question

I want strore a xml file in registry and after restore it.Do it possible?
i try create with this code But it Not Responding?!what is problem?
enter code here
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void Form1_Load(object sender, EventArgs e)
{
MemoryStream stream = new MemoryStream();
BinaryFormatter formatter = new BinaryFormatter();
List<int> f = new List<int>();
f.Add(4);
formatter.Serialize(stream, f);
byte[] binary = stream.ToArray();
string yu = Encoding.UTF8.GetString(binary);
RegistryKey key = Registry.Users;
RegistryKey key2 = key.OpenSubKey(".DEFAULT", true);
key2.SetValue("my4",yu,RegistryValueKind.String ); // "why writed empty string in registry
}
}

Answer 1

A few remarks on this:
1: The registry isn't the right place to save a whole XML file. More normal might be to save the xml to the filesystem and possibly save its location in the registry.
2: Registry.Users refers to a location in the registry where you wouldn't normally save data. Either it should be in HKey_Current_User (Registry.CurrentUser) or HKey_Local_Machine (Registry.LocalMachine) depending on whether the data is specific to all users on the PC or just the current user.
3: I'm extremely confused about what the coding in the first two questions is trying to achieve. Its a long way around to make a string, the contents may not be compatible with the registry and I can see anything related to XML.
I would make a strong warning that updating the registry without knowing exactly what you're doing is very dangerous. It could easily lead to odd errors or even a non-booting PC. Only proceed with trying registry updates once you fully understand how it works. I would start with an article like this one and read on from there.