Can I use an external assembly's static method like [ThreadStatic] method?

Here is my situation. The assembly class (which I do not have access to its source) has this structure

public class RegistrationManager()
{
    private RegistrationManager() {}
    public static void RegisterConfiguration(int ID) {}
    public static object DoWork() {}
    public static void UnregisterConfiguration(int ID) {}
}

Once registered, I cannot call the DoWork() with a different ID without unregistering the previously registered one. Actually I want to call the DoWork() method with different IDs simultaneously with multi-threading.

If the RegisterConfiguration(int ID) method was [ThreadStatic], I could have call it in different threads without problems with calls, right? So, can I apply the [ThreadStatic] attribute to this method or is there any other way I can call the two static methods same time without waiting for other thread to unregister it?

If I check it like the following, it should work.

for(int i=0; i < 10; i++)
{
    new Thread(new ThreadStart(() => Checker(i))).Start();
}

public string Checker(int i)
{
    public static void RegisterConfiguration(i); // Now i cannot register second time
    public static object DoWork(i);
    Thread.Sleep(5000); // DoWork() may take a little while to complete before unregistered
    public static void UnregisterConfiguration(i);
}