# RemoveRangeSwapBack(int, int)

> Copies the last "N" elements of this list to a range in this list. Decrements the length by "N".

## Definition

* **Type:** Method
* **Namespace:** [Unity.Collections](/engine/6000.7/script-reference/unity/collections.md)
* **Assembly:** UnityEngine.ManagedKernelModule

```csharp
public void RemoveRangeSwapBack(int index, int count)
```

### Parameters

**** (\[int]\(https\://learn.microsoft.com/dotnet/api/system.int32)): The first index of the destination range.**** (\[int]\(https\://learn.microsoft.com/dotnet/api/system.int32)): The number of elements to copy and the amount by which to decrement the length.

### Remarks

Copies the last `count`-numbered elements to the range starting at `index`.

Useful as a cheap way to remove elements from a list when you don't care about preserving order.

Does nothing if the count is less than 1.