var testResourceAttributes = new Dictionary<string, object>()
{
    // THESE ATTRIBUTES DESCRIBE YOUR SERVICE AND WILL BE EXPORTED
    { "service.instance.id", "testInstance" },
    { "service.name", "testName" },
    { "service.namespace", "testNamespace" },
    { "service.version", "testVersion" },

     // CUSTOM ATTRIBUTES ARE NOT EXPORTED TODAY
    { "customAttribute", "customValue" },
};

var tracerProvider = Sdk.CreateTracerProviderBuilder()
    .ConfigureResource(x => x.AddAttributes(testResourceAttributes))
    .AddAzureMonitorTraceExporter()
    .Build();

 var meterProvider = Sdk.CreateMeterProviderBuilder()
     .ConfigureResource(x => x.AddAttributes(testResourceAttributes))
     .AddAzureMonitorMetricExporter()
     .Build();

var loggerFactory = LoggerFactory.Create(builder =>
{
    builder
        .AddOpenTelemetry(options =>
        {
            options.SetResourceBuilder(ResourceBuilder.CreateDefault().AddAttributes(testResourceAttributes));
            options.AddAzureMonitorLogExporter();
        });
});