# Sandbox.ParticleSystem.LoadAsync

```csharp
static System.Threading.Tasks.Task<ParticleSystem> LoadAsync(string filename)
```

> **Obsolete.**

Load a particle system by file path.

### Parameters

- `filename` (`string`): The file path to load as a particle system.

### Returns

`System.Threading.Tasks.Task<ParticleSystem>`: The loaded particle system, or null

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