# Sandbox.Physics.CollisionRules.GetCollisionRule

```csharp
Result GetCollisionRule(string left, string right)
```

Gets the specific collision rule for a pair of tags.

### Parameters

- `left` (`string`)
- `right` (`string`)

### Returns

`Result`

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