# GetSystemAssemblyDirectories(ApiCompatibilityLevel)

> Gets the directories that contain the system references for an API compatibility level.

## Definition

* **Type:** Method
* **Namespace:** [UnityEditor.Compilation](/engine/7000.0/script-reference/unityeditor/compilation.md)
* **Assembly:** UnityEditor.CoreModule

```csharp
public static string[] GetSystemAssemblyDirectories(ApiCompatibilityLevel apiCompatibilityLevel)
```

### Parameters

**** (\[ApiCompatibilityLevel]\(/engine/7000.0/script-reference/unityeditor/apicompatibilitylevel)): The [ApiCompatibilityLevel](/engine/7000.0/script-reference/unityeditor/apicompatibilitylevel.md) to get system reference directories for.

### Returns

| Type                                                               | Description                                             |
| ------------------------------------------------------------------ | ------------------------------------------------------- |
| [string\[\]](https://learn.microsoft.com/dotnet/api/system.string) | Returns an array populated by absolute directory paths. |