# What's new in Version 4

Version 4 of MauiReactor targets MAUI .NET 10, and even though it is highly compatible with the previous version, targeting .NET 9, it has some notable breaking changes on some tooling (hot-reload).

{% hint style="info" %}
For an up-to-date list of new features for MauiReactor4, please head to [https://github.com/adospace/reactorui-maui/issues/346](https://github.com/adospace/reactorui-maui/issues/263)
{% endhint %}

## Hot-reload changes

Hot-reload is now available with a separate package `Reactor.Maui.HotReload`. Be sure to reference the package in your project; otherwise, the EnableMauiReactorHotReload() won't compile.

Add the call to `UseMauiReactorHotReload()` call in `program.cs` :

<pre class="language-csharp" data-line-numbers><code class="lang-csharp">var builder = MauiApp.CreateBuilder();
builder
    .UseMauiReactorApp&#x3C;HomePage>()
<strong>#if DEBUG
</strong><strong>    .UseMauiReactorHotReload();
</strong><strong>#endif
</strong>    ...;

</code></pre>

In the project definition, add the following lines:

<pre class="language-xml" data-line-numbers><code class="lang-xml">	&#x3C;ItemGroup>
		&#x3C;PackageReference Include="Microsoft.Maui.Controls" Version="10.0.10" />
		&#x3C;PackageReference Include="Microsoft.Extensions.Logging.Debug" Version="10.0.0" />
<strong>		&#x3C;PackageReference Include="Reactor.Maui" Version="4.0.15" />
</strong>	&#x3C;/ItemGroup>

<strong>	&#x3C;ItemGroup Condition="'$(Configuration)'=='Debug'">
</strong><strong>		&#x3C;PackageReference Include="Reactor.Maui.HotReload" Version="4.0.15" />
</strong><strong>	&#x3C;/ItemGroup>
</strong></code></pre>