# None

> This mode is obsolete. You should use CollisionDetectionMode2D.Discrete mode.

## Definition

* **Type:** Field
* **Namespace:** [UnityEngine](/engine/6000.5/script-reference/unityengine.md)
* **Assembly:** UnityEngine.Physics2DModule

> **Warning:**
>
> **Removed.** Enum member CollisionDetectionMode2D.None has been deprecated. Use CollisionDetectionMode2D.Discrete instead
>
> **Upgrade to** [CollisionDetectionMode2D.Discrete](/engine/6000.5/script-reference/unityengine/collisiondetectionmode2d/discrete.md)

```csharp
None = 0
```