> ## Documentation Index
> Fetch the complete documentation index at: https://ancplua.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# AL0076 - Missing OpenTelemetry configuration

> Ensure AddOpenTelemetry() is called in service configuration

Source: [Al0076MissingOTelConfigurationAnalyzer.cs](https://github.com/ANcpLua/ANcpLua.Analyzers/blob/main/src/ANcpLua.Analyzers/Analyzers/Al0076MissingOTelConfigurationAnalyzer.cs)

## Description

Projects that use `ActivitySource` or `Meter` should call `AddOpenTelemetry()` in their service configuration to ensure telemetry is exported.

## Bad Code

```csharp theme={null}
var builder = WebApplication.CreateBuilder(args);
// Uses ActivitySource but never configures OpenTelemetry
var app = builder.Build();
```

## Good Code

```csharp theme={null}
var builder = WebApplication.CreateBuilder(args);
builder.Services.AddOpenTelemetry()
    .WithTracing(t => t.AddSource("MyService"))
    .WithMetrics(m => m.AddMeter("MyService"));
var app = builder.Build();
```

## Properties

* **Category**: OpenTelemetry
* **Severity**: Warning
* **Enabled by default**: True
* **Code fix available**: False

## Configuration

```editorconfig theme={null}
dotnet_diagnostic.AL0076.severity = warning
```