Legacy Documentation: Version 2018.1 (Go to current version)
  • C#
  • JS

Script language

Select your preferred scripting language. All code snippets will be displayed in this language.


class in Unity.Collections.LowLevel.Unsafe


Implemented in:UnityEngine.CoreModule

Suggest a change


Thank you for helping us improve the quality of Unity Documentation. Although we cannot accept all submissions, we do read each suggested change from our users and will make updates where applicable.


Submission failed

For some reason your suggested change could not be submitted. Please <a>try again</a> in a few minutes. And thank you for taking the time to help us improve the quality of Unity Documentation.




By default native containers are tracked by the safety system to avoid race conditions. The safety system encapsulates the best practices and catches many race condition bugs from the start.

But sometimes you need to express job & data access that doesn't fit into the safety system. This attribute lets you explicitly disable the safety system for that specific container. This gives you full control but it also means that if you for example Dispose() a NativeArray while a job is running the safety system will not be able to give you any error messages at all. Unity will most likely crash in that situation.

no example available in JavaScript
struct MyJob : IJob
    NativeArray<int> unsafeArrayAccess;

void Execute() { ... } }

Did you find this page useful? Please give it a rating: