ProgressDialog.xaml

<platformUi:DialogWindow x:Class="YetiVSI.ProgressDialog"
                         xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
                         xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
                         xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
                         xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
                         xmlns:local="clr-namespace:YetiVSI"
                         xmlns:platformUi="clr-namespace:Microsoft.VisualStudio.PlatformUI;assembly=Microsoft.VisualStudio.Shell.15.0"
                         mc:Ignorable="d"
                         Title="Stadia" Width="471" SizeToContent="Height" ResizeMode="NoResize"
                         WindowStartupLocation="CenterOwner" ShowInTaskbar="False">
    <StackPanel Margin="4">
        <TextBlock x:Name="description" Margin="4" Text="Description" TextWrapping="Wrap"></TextBlock>
        <TextBlock x:Name="message" Margin="4" TextWrapping="Wrap"/>
        <DockPanel>
            <Button x:Name="cancel" Content="Cancel" IsCancel="True" Width="100" Margin="4" DockPanel.Dock="Right"/>
            <ProgressBar IsIndeterminate="True" Height="20" Margin="4" />
        </DockPanel>
    </StackPanel>
</platformUi:DialogWindow>