# ReaderInput.ReadBytes(Span<byte>)

[Type overview](/orleans/docs/api/csharp/microsoft.orleans.serialization/orleans.serialization.buffers.readerinput/) | [Methods](/orleans/docs/api/csharp/microsoft.orleans.serialization/orleans.serialization.buffers.readerinput/methods/)

```csharp
public abstract void ReadBytes(Span<byte> destination)
```

Fills the destination span with data from the input.

### Parameters

- `destination` (`Span<byte>`): The destination.