Extracted class

Extracted class

class FileLogger
{
    public void Log(string exceptionMsg)
    {
      using (StreamWriter file = new StreamWriter("c:\\log.txt",true)
      {
        file.WriteLine(exceptionMsg.ToString());
      }
    }
}

public static class Authenticate
{
   public static void ClientAuthentication(HttpClient client)
    {
        client.DefaultRequestHeaders.Accept.Clear();
        client.DefaultRequestHeaders.Authorization =
             new AuthenticationHeaderValue("Basic", Authenticate.FeatchApiKey());
    }
}