# Sandbox.Project.IsReadOnly

```csharp
bool IsReadOnly { get; set; }
```

If true this project's config didn't come from a .sbproj on disk and is never written back
to one. An exported standalone game is one of these: its config is embedded in the
executable and its install folder is not ours to write to.

Declared in [Sandbox.Project](/api/Sandbox.Project).
Assembly: `Sandbox.Engine`.