Fix error in c# function.

Bid ONLY if you have experience with c# classes Registry and WindowsIdentity This is a very quick task, just a few lines of code if you know exactly how to do this, however if you don't have experience with those classes you will lose days to try to understand the problem. So in your bid you have to confirm that you already know those classes or your bid will be ignored. I have a wpf solution with just a button with the name btnUpdateKey. When you click the button btnUpdateKey the result have to be: - the creation of the user "UserName" added to Administrators group - the creation of the Key "KeyName" with access granted only to the user "UserName" - the Key "KeyName" have to be updated with the value "new value" by the function UpdateRegKey() The result is just this but this have to be done impersonating the created user and only that user can have access to that Key. There are only a few functions: 1. GetUser() - If User don't exist create a new User and add it to Administrators group 2. GetRegKey() - Using Impersonate with the User created by the first function it create a new Registry Key with CreateSubKey in the HKEY_LOCAL_MACHINE\SOFTWARE\ Registry Key. All the code is already done. I need to: - Fix an access denied error on CreateSubKey. - Add some code to disable inheritance on the creeted Key so that this key is not accessible from others users. The impersonated user that create the key it is the owner so it is necessary to disable the inherited authorizations that the key get from the parent key so that only the owner of the key can get access to that key. (see image to better understand this point) - Check that the application work as described above.