public static void Main(string[] args)
    {
        Meter meter = null;
        var meterProviderBuilder = Sdk
            .CreateMeterProviderBuilder()
            .AddMeter("Test")
            .SetResourceBuilder(
                ResourceBuilder.CreateDefault()
                    .AddService(serviceName: "Test"));
        
        meterProviderBuilder.AddPrometheusHttpListener();
        meterProviderBuilder.AddRuntimeInstrumentation();
        
        var tracerProvider = meterProviderBuilder.Build();
        
        while(true){
            meter?.Dispose();
            meter = new Meter("Test");
            var rd = new Random();
            
            meter.CreateObservableGauge(
                "requests", 
                () => new[] {
                    new Measurement<double>(rd.NextDouble() * rd.Next(100))
                },
                description: "Request per second");
            
             // will see after couple of minutes that the MetricReader contains a lot of MetricPoint[], even if we dispose the Meter after each iteration
            Thread.Sleep(200);
        }
    }