private NullAuditMetricManager()
 {
     Metrics = new IAuditMetric[0];
     Config  = new MetricManagerConfig <IAuditMetric>(NullAuditMetricReporter.Instance);
 }
 private NullStatusMetricManager()
 {
     Metrics = new NullStatusMetric <T> [0];
     Config  = new MetricManagerConfig <IStatusMetric <T> >(NullStatusMetricReporter <T> .Instance);
 }