# Sandbox.SandboxSystemExtensions.IsInitOnly

```csharp
static bool IsInitOnly(System.Reflection.PropertyInfo property)
```

Determine if this property is init-only.

### Parameters

- `property` (`System.Reflection.PropertyInfo`): The property to test.

### Returns

`bool`: Returns true if the property is init-only, false otherwise.

Declared in [Sandbox.SandboxSystemExtensions](/api/Sandbox.SandboxSystemExtensions).
Assembly: `Sandbox.System`.