# ResourceDependencyDiscoveryOptions Properties

- Package: [Aspire.Hosting](/reference/api/csharp/aspire.hosting.md)
- Type: [ResourceDependencyDiscoveryOptions](/reference/api/csharp/aspire.hosting/resourcedependencydiscoveryoptions.md)
- Kind: `Properties`
- Members: `2`

Changes how resource dependencies are discovered.

## CacheAnnotationCallbackResults

- Name: `CacheAnnotationCallbackResults`
- Modifiers: `get; init`
- Returns: `bool`
- Source: [GitHub](https://github.com/microsoft/aspire/blob/bd20f904cde09ecb9c9ae5116a6f13614bf2d7c2/src/Aspire.Hosting/ApplicationModel/ResourceDependencyDiscoveryOptions.cs)

When true, unresolved values from annotation callbacks will be cached and reused on subsequent evaluations of the same annotation, rather than re-evaluating the callback each time.

```csharp
public bool CacheAnnotationCallbackResults { get; init; }
```

## DiscoveryMode

- Name: `DiscoveryMode`
- Modifiers: `get; init`
- Returns: [ResourceDependencyDiscoveryMode](/reference/api/csharp/aspire.hosting/resourcedependencydiscoverymode.md)
- Source: [GitHub](https://github.com/microsoft/aspire/blob/bd20f904cde09ecb9c9ae5116a6f13614bf2d7c2/src/Aspire.Hosting/ApplicationModel/ResourceDependencyDiscoveryOptions.cs)

Sets the mode for discovering resource dependencies. See [ResourceDependencyDiscoveryMode](/reference/api/csharp/aspire.hosting/resourcedependencydiscoverymode.md) for details on the available modes.

```csharp
public ResourceDependencyDiscoveryMode DiscoveryMode { get; init; }
```