# guid

> The GUID of a Player build.

## Definition

* **Type:** Property
* **Namespace:** [UnityEditor.Build.Reporting](/engine/6000.6/script-reference/unityeditor/build/reporting.md)
* **Assembly:** UnityEditor.CoreModule

```csharp
public readonly GUID guid { get; }
```

### Remarks

For successful Player builds this GUID is written to boot.config in the build output, unless [BuildOptions.NoUniqueIdentifier](/engine/6000.6/script-reference/unityeditor/buildoptions/nouniqueidentifier.md) is set. It is available in the runtime through [\_buildGUID](/engine/6000.6/script-reference/unityengine/application/buildguid.md). Incremental builds that produce the same output may reuse a previously generated build GUID.