# preSolveCallbacks

> Controls whether this shape produces pre-solve callbacks. This only applies to Dynamic bodies and is ignored for triggers. These are relatively expensive so disabling them can provide a significant performance benefit. A pre-solve callback will call the _callbackTarget for both shapes involved if they implement PhysicsCallbacks.IPreSolveCallback.

## Definition

* **Type:** Property
* **Namespace:** [Unity.U2D.Physics](/engine/6000.5/script-reference/unity/u2d/physics.md)
* **Assembly:** UnityEngine.PhysicsCore2DModule

```csharp
public bool preSolveCallbacks { get; set; }
```