Application Insights Telemetry ignore statuscodes for specific operations

ApplicationInsightsFilter.cs

using Microsoft.ApplicationInsights.Channel;
using Microsoft.ApplicationInsights.DataContracts;
using Microsoft.ApplicationInsights.Extensibility;
using System.Linq;

namespace AppInsightsFilter
{
	public class ApplicationInsightsFilter : ITelemetryProcessor
	{
		private ITelemetryProcessor Next { get; set; }
		private OperationNameResponseCodeFilter[] OperationResponseCodeFilter { get; set; }

		public ApplicationInsightsFilter(ITelemetryProcessor next, params OperationNameResponseCodeFilter[] operationResponseCodeFilter)
		{
			Next = next;
			OperationResponseCodeFilter = operationResponseCodeFilter;
		}

		public void Process(ITelemetry item)
		{
			// To filter out an item, just return
			if (ShouldIgnoreRequest(item))
			{
				return;
			}

			Next.Process(item);
		}

		private bool ShouldIgnoreRequest(ITelemetry item)
		{
			if (item.Context.Operation.Name == null) return false;
			var req = item as RequestTelemetry;
			if (req == null) return false;

			var operationName = item.Context.Operation.Name.ToLower();
			return OperationResponseCodeFilter
				.Any(f => operationName.StartsWith(f.OperationName) && f.ResponseCode == req.ResponseCode);
		}
	}

	public struct OperationNameResponseCodeFilter
	{
		public string ResponseCode { get; set; }
		public string OperationName { get; set; }
	}
}