Graphite.System.AppPoolListener.ReportValue C# (CSharp) Method

        public float? ReportValue()
        {
            // AppPool not found -> is not started.
            if (string.IsNullOrEmpty(this.counterName) && !LoadCounterName())
                return null;

            if (this.counterListener == null)
            {
                try
                {
                    this.counterListener = new CounterListener(category, this.counterName, counter);
                }
                catch (InvalidOperationException)
                {
                }
            }

            if (this.counterListener == null)
                return null;

            try
            {
                return this.counterListener.ReportValue(); ;
            }
            catch (InvalidOperationException)
            {
                // counter not available.
                this.counterListener = null;

                return null;
            }
        }