# HealthCheckAnnotation

- Kind: `class`
- Package: [Aspire.Hosting](/reference/api/csharp/aspire.hosting.md)
- Version: `13.3.0`
- Namespace: `Aspire.Hosting.ApplicationModel`
- Target framework: `net8.0`
- Source: [GitHub](https://github.com/microsoft/aspire/blob/bd20f904cde09ecb9c9ae5116a6f13614bf2d7c2/src/Aspire.Hosting/ApplicationModel/HealthCheckAnnotation.cs)
- Implements: [IResourceAnnotation](/reference/api/csharp/aspire.hosting/iresourceannotation.md)

An annotation which tracks the name of the health check used to detect to health of a resource.

## Definition

```csharp
namespace Aspire.Hosting.ApplicationModel;

public class HealthCheckAnnotation
    : Aspire.Hosting.ApplicationModel.IResourceAnnotation
{
    // ...
}
```

## Constructors

- [HealthCheckAnnotation(string)](/reference/api/csharp/aspire.hosting/healthcheckannotation/constructors.md#constructor-string) -- An annotation which tracks the name of the health check used to detect to health of a resource.

## Properties

- [Key](/reference/api/csharp/aspire.hosting/healthcheckannotation/properties.md#key) : `string` `get` -- The key for the health check in the app host which associated with this resource.