# Sandbox.ResourceLoadContext.ReadData

```csharp
System.ReadOnlySpan<byte> ReadData(string blockName)
```

Read a named block's data. The span points directly into the loaded file,
so it's only valid during `M:Sandbox.Resource.OnLoaded(Sandbox.ResourceLoadContext)` - copy anything
you want to keep.

### Parameters

- `blockName` (`string`)

### Returns

`System.ReadOnlySpan<byte>`

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