# OpenTelemetryJointExtensions Methods

- Package: [Joinery.Dovetail.OpenTelemetry](/Dovetail/api/joinery.dovetail.opentelemetry.md)
- Type: [OpenTelemetryJointExtensions](/Dovetail/api/joinery.dovetail.opentelemetry/joinery.dovetail.joints.opentelemetryjointextensions.md)
- Kind: `Methods`
- Members: `1`

Extension methods for applying OpenTelemetry parts.

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## ApplyOpenTelemetry(IOpenTelemetryBuilder, IDovetailContext, CancellationToken)

- Name: `ApplyOpenTelemetry(IOpenTelemetryBuilder, IDovetailContext, CancellationToken)`
- Modifiers: `extension`
- Returns: `ValueTask`

Applies the registered OpenTelemetry parts.

```csharp
public static class OpenTelemetryJointExtensions
{
    public static ValueTask ApplyOpenTelemetry(
        this IOpenTelemetryBuilder builder,
        IDovetailContext context,
        CancellationToken cancellationToken = default(CancellationToken))
    {
        // ...
    }
}
```

## Parameters

- `builder` (`IOpenTelemetryBuilder`)
- `context` (`IDovetailContext`)
- `cancellationToken` (`CancellationToken`) `optional`

## Exceptions

- `ArgumentNullException` -- `context` is `null`.