<telerikReport:ReportViewer Grid.Row="1"
                            Grid.Column="1" 
                            Name="reportViewer1"
                            ReportSource="{Binding ReportSource}">
    <telerikReport:ReportViewer.Resources>
        <Style TargetType="telerikReport:ReportViewer" BasedOn="{StaticResource {x:Type telerikReport:ReportViewer}}">
            <Setter Property="BorderBrush" Value="{telerik:Windows11Resource ResourceKey=PrimaryBorderBrush}"/>
            <Setter Property="BorderThickness" Value="1"/>
            <Setter Property="Margin" Value="5"/>
            <Setter Property="CornerRadius" Value="4"/>
        </Style>
    </telerikReport:ReportViewer.Resources>
</telerikReport:ReportViewer>