---
title: MustBeTrue
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/mustbetrue
latest_url: https://docs.unity.com/en-us/engine/7000.0/script-reference/unityengine/assertions/must/mustextensions/mustbetrue.md
last_updated: 2026-10-07
generated_at: 2026-11-12T00:42:45.588Z
locale: en-us
---

# MustBeTrue

> An extension method for Assert.IsTrue.

## Definition

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

## MustBeTrue(bool)

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

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

```csharp
[Conditional("UNITY_ASSERTIONS")]
public static void MustBeTrue(this bool value)
```

### Parameters

**** (\[bool]\(https\://learn.microsoft.com/dotnet/api/system.boolean)): 

### Examples

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

public class AssertionExampleClass : MonoBehaviour
{
    void Update()
    {
        //Make sure the Game Object is always in active state
        gameObject.activeSelf.MustBeTrue();
    }
}
```

## MustBeTrue(bool, string)

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

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

```csharp
[Conditional("UNITY_ASSERTIONS")]
public static void MustBeTrue(this bool value, string message)
```

### Parameters

**** (\[bool]\(https\://learn.microsoft.com/dotnet/api/system.boolean)): **** (\[string]\(https\://learn.microsoft.com/dotnet/api/system.string)): 

### Examples

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

public class AssertionExampleClass : MonoBehaviour
{
    void Update()
    {
        //Make sure the Game Object is always in active state
        gameObject.activeSelf.MustBeTrue();
    }
}
```