# Write metrics to the trace log


This sample demonstrates how to write [metrics](/monitoring/metrics/index.md) information to the trace log.

There are many ways to look at the trace log. One way is to use the [DbgView utility provided by Sysinternals](https://learn.microsoft.com/en-us/sysinternals/downloads/debugview).

![DbgView by Sysinternals](dbgview.png)

## Running the sample

 1. Run the solution in the Visual Studio debugger. A console application will start.
 1. Press the 'enter' key to send a message.
 1. Check the Visual Studio debug output window for metrics information being written to the trace log.

## Sending metrics data to Trace Log

<!-- snippet: EnableMetricTracing -->

```cs
var metrics = endpointConfiguration.EnableMetrics();

metrics.RegisterObservers(
    register: context =>
    {
        foreach (var duration in context.Durations)
        {
            duration.Register(
                observer: (ref DurationEvent @event) =>
                {
                    Trace.WriteLine(
                        $"Duration: '{duration.Name}'. Value: '{@event.Duration}' ({@event.MessageType})");
                });
        }

        foreach (var signal in context.Signals)
        {
            signal.Register(
                observer: (ref SignalEvent @event) =>
                {
                    Trace.WriteLine($"Signal: '{signal.Name}' ({@event.MessageType})");
                });
        }
    });
```

<!-- endsnippet -->