---
title: MustExtensions
product: Unity Editor
version: '7000.0'
latest_version: '7000.0'
status: This page documents version 7000.0. The latest version is 7000.0.
canonical: https://docs.unity.com/en-us/engine/7000.0/script-reference/unityengine/assertions/must/mustextensions
latest_url: https://docs.unity.com/en-us/engine/7000.0/script-reference/unityengine/assertions/must/mustextensions.md
last_updated: 2026-10-07
generated_at: 2026-11-11T12:03:28.584Z
locale: en-us
---

# MustExtensions

> An extension class that serves as a wrapper for the Assert class.

## Definition

* **Type:** Class
* **Namespace:** [UnityEngine.Assertions.Must](/engine/7000.0/script-reference/unityengine/assertions/must.md)
* **Assembly:** UnityEngine.CoreModule

> **Warning:**
>
> **Deprecated.** Must extensions are deprecated. Use UnityEngine.Assertions.Assert instead

```csharp
public static class MustExtensions
```

## Remarks

The MustExtension class wraps the Assert into a more readable and shorter syntax.

## Examples

```csharp
using UnityEngine;
using UnityEngine.Assertions;
using UnityEngine.Assertions.Must;

public class ExampleClass : MonoBehaviour
{
    public int health;
    public GameObject go;
    void Update()
    {
        //This assertion
        Assert.AreNotEqual(0, health);
        //can be also written like this
        health.MustNotBeEqual(0);

        //Same with this assertion
        Assert.IsTrue(go.activeInHierarchy);
        //can be also written like this
        go.activeInHierarchy.MustBeTrue();
    }
}
```