> 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/3.1/api/csharp/yarn.compiler/yarn.compiler.compilationjob/yarn.compiler.compilationjob.library.md).

# Library

Field in [CompilationJob](/3.1/api/csharp/yarn.compiler/yarn.compiler.compilationjob.md)

## Summary

The [Library](/3.1/api/csharp/yarn.compiler/yarn.compiler.compilationjob/yarn.compiler.compilationjob.library.md) that contains declarations for functions.

```csharp
public Library? Library;
```