unknown log files IIS creates

Question

I have a question:

I'm working on a project in C # that creates log files in my local computer creates the necessary files and writes perfectly.

Trace.Listeners.Add(new TextWriterTraceListener("mylog.log"), "myListener"));
Trace.TraceInformation( "test message");
Trace.Flush();

But in my server also creates other files with unknown names like this:

62735167-1d87-4521-a1f2-40504fb51b59mylog.log

and contains the following lines I write. I can not delete that file. Any solution for this problem?

thanks