---
title: MustNotBeEqual
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/mustnotbeequal
latest_url: https://docs.unity.com/en-us/engine/7000.0/script-reference/unityengine/assertions/must/mustextensions/mustnotbeequal.md
last_updated: 2026-10-07
generated_at: 2026-11-11T00:55:42.540Z
locale: en-us
---

# MustNotBeEqual

> An extension method for Assert.AreNotEqual.

## Definition

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

## MustNotBeEqual\<T>(T, T)

An extension method for [Assert.AreNotEqual](/engine/7000.0/script-reference/unityengine/assertions/assert/arenotequal.md).

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

```csharp
[Conditional("UNITY_ASSERTIONS")]
public static void MustNotBeEqual<T>(this T actual, T expected)
```

### Parameters

**** (T): **** (T):&#x20;

### Examples

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

public class AssertionExampleClass : MonoBehaviour
{
    void Update()
    {
        //Make sure the Game Object's layer is never set to 0
        gameObject.layer.MustNotBeEqual(0);
    }
}
```

## MustNotBeEqual\<T>(T, T, string)

An extension method for [Assert.AreNotEqual](/engine/7000.0/script-reference/unityengine/assertions/assert/arenotequal.md).

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

```csharp
[Conditional("UNITY_ASSERTIONS")]
public static void MustNotBeEqual<T>(this T actual, T expected, string message)
```

### Parameters

**** (T): **** (T): **** (\[string]\(https\://learn.microsoft.com/dotnet/api/system.string)):&#x20;

### Examples

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

public class AssertionExampleClass : MonoBehaviour
{
    void Update()
    {
        //Make sure the Game Object's layer is never set to 0
        gameObject.layer.MustNotBeEqual(0);
    }
}
```