</pre>

<RadzenText TextStyle="TextStyle.H6" TagName="TagName.H3" class="rz-mt-12 rz-mb-4">3. Open the <code>App.razor</code> file of your application and add this code<code>@@code{}</code>:</RadzenText>

<pre class="rz-p-4">

<code>

@@code {

[CascadingParameter]

private HttpContext HttpContext { get; set; }

[Inject]

private ThemeService ThemeService { get; set; }

protected override void OnInitialized()

{

base.OnInitialized();

if (HttpContext != null)

{

var theme = HttpContext.Request.Cookies["MyApplicationTheme"];

if (!string.IsNullOrEmpty(theme))

{

ThemeService.SetTheme(theme, false);

}

}

}

</code>