title: Content Dialog not showing up WINUI3
body: <p>I'm trying to show a popup to edit a brand in my app but it doesn't show up.</p>
  <p>Function where I call the Dialog:</p>
  <pre><code>private async Task EditBrandAsync(Brand brand)
  {
      var dialog = new ContentDialogs.EditBrandDialog(brand);
      await dialog.ShowAsync();
  }
  </code></pre>
  <p>ContentDialog XAML:</p>
  <pre><code>&lt;ContentDialog
      x:Class=&quot;xizSoft.ContentDialogs.EditBrandDialog&quot;
      xmlns=&quot;http://schemas.microsoft.com/winfx/2006/xaml/presentation&quot;
      xmlns:x=&quot;http://schemas.microsoft.com/winfx/2006/xaml&quot;
      xmlns:local=&quot;using:xizSoft.ContentDialogs&quot;
      xmlns:d=&quot;http://schemas.microsoft.com/expression/blend/2008&quot;
      xmlns:mc=&quot;http://schemas.openxmlformats.org/markup-compatibility/2006&quot;
      mc:Ignorable=&quot;d&quot;
      Background=&quot;{ThemeResource ApplicationPageBackgroundThemeBrush}&quot;&gt;
  
      &lt;StackPanel&gt;
          &lt;TextBlock Text=&quot;Marca&quot; Style=&quot;{StaticResource SubheaderTextBlockStyle}&quot;/&gt;
  
          &lt;TextBox Header=&quot;Nome&quot; Text=&quot;{Binding Name}&quot;/&gt;
          &lt;TextBox Header=&quot;Logotipo&quot; Text=&quot;{Binding LogoFileName}&quot;/&gt;
  
          &lt;StackPanel&gt;
              &lt;Image Source=&quot;{Binding LogoFileName}&quot;/&gt;
          &lt;/StackPanel&gt;
      &lt;/StackPanel&gt;
  &lt;/ContentDialog&gt;
  </code></pre>
  <p>Code-behind:</p>
  <pre><code>namespace xizSoft.ContentDialogs
  {
    public sealed partial class EditBrandDialog : ContentDialog
      {
          public Brand _brand {get; set;}
  
          public EditBrandDialog(Brand brand)
          { 
              this.InitializeComponent();
              this.DataContext = _brand = brand;
          }
      }
  }
  </code></pre>
  <p>I've already tryied do debug and the content dialog is being called so I dont know why it isn't showing up.</p>