private void Trace()
{
_trace = "WARNING! GC-ed >>" + this.GetType().FullName + "<< (should be explicitly closed) \r\n";
if (NetEventSource.IsEnabled) NetEventSource.Info(this, "Creating SafeHandle");
#if TRACE_VERBOSE
string stacktrace = Environment.StackTrace;
_trace += stacktrace;
#endif //TRACE_VERBOSE
}