# Collider

> The first Collider component of the ContactPair.

## Definition

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

> **Warning:**
>
> **Deprecated.** Please use ContactPair.collider instead.
>
> **Upgrade to** [ContactPair.collider](/engine/6000.5/script-reference/unityengine/contactpair/collider-1.md)

```csharp
public Collider Collider { get; }
```

### Remarks

This property is only accessible from the main thread.