# Sandbox.Surface.BaseSurface

```csharp
string BaseSurface { get; set; }
```

Filepath of the base surface. Use [SetBaseSurface](/api/Sandbox.Surface/SetBaseSurface) and [GetBaseSurface](/api/Sandbox.Surface/GetBaseSurface).

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