Write a Stringformated Hex Block to registry in Binary value

Question

I am really get stucked with something. I have a string which includes hex values:

string creatorSid = @\"01,05,00,00,00,00,00,05,15,00,00,00,10,b1

Answer 1

When you have string, you've to use RegistryValueKind.String.

key.SetValue("creatorSID", creatorSid , RegistryValueKind.String);

If at all you need to use RegistryValueKind.Binary, you need to convert the string to byte[] and store it as byte[].

To store the value:

var data = Encoding.Unicode.GetBytes(creatorSid);
key.SetValue("creatorSID", data, RegistryValueKind.Binary);

To get the value back:

var data = (byte[])key.GetValue("creatorSID");
if (data != null)
{
    string creatorSID = Encoding.Unicode.GetString(data);
}

RegistryKey.SetValue

Edit: It seems you don't need to convert the , character as byte. Try the following.

To store the value:

var data = security.Split(',')
    .Select(x => Convert.ToByte(x, 16))
    .ToArray();
key.SetValue("creatorSID", data, RegistryValueKind.Binary);

To get the value back:

var data = (byte[])key.GetValue("creatorSID");
if (data != null)
{
    string creatorSID = string.Join(",", data.Select(x => x.ToString("x2")).ToArray());
}