> For the complete documentation index, see [llms.txt](https://docs.yarnspinner.dev/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.yarnspinner.dev/api/csharp/yarn.compiler/yarn.compiler.project/yarn.compiler.project.allowlanguagepreviewfeatures.md).

# AllowLanguagePreviewFeatures

Property in [Project](/api/csharp/yarn.compiler/yarn.compiler.project.md)

## Summary

Gets or sets a value indicating whether compiler features that are not intended for production use are allowed.

```csharp
public bool AllowLanguagePreviewFeatures { get; set; }
```