App insights telemetry

appinsights.cs

var telemetry = new DependencyTelemetry
{
    Type = "type",
    Name = nameof(CalculationCycle)
};

telemetry.Start();

telemetry.Context.Operation.Id = telemetry.Id;
telemetry.Context.Operation.ParentId = telemetry.Id;

try
{
    //do stuff that takes long time

    telemetry.Success = true;
}
finally
{
    telemetry.Stop();

    TelemetryClient c = new TelemetryClient();
    c.Track(telemetry);
}