WPF

public static void Install()
{
    InstallIIS();
    InstallASPDotNet();
}

private static void InstallIIS()
{
    InstallFeature("IIS", "/Online /Enable-Feature /FeatureName:IIS-DefaultDocument /All");
}

private static void InstallASPDotNet()
{
    InstallFeature("ASP.Net", "/Online /Enable-Feature /FeatureName:IIS-ASPNET45 /All");
}

private static void InstallFeature(string featureName, string args)
{
    try
    {
        // Raise the task changed event so the UI shows what is installing
        CurrentTaskChanged($"Installing {featureName}");

        string dism = Path.Combine(Environment.ExpandEnvironmentVariables("%windir%"), "system32", "dism.exe");
        if (Environment.Is64BitOperatingSystem && !Environment.Is64BitProcess)
        {
            dism = Path.Combine(Environment.ExpandEnvironmentVariables("%windir%"), "sysnative", "dism.exe");
        }

        var process = new Process();
        var startInfo = new ProcessStartInfo
        {
            UseShellExecute = false,
            CreateNoWindow = false,
            RedirectStandardOutput = true,
            FileName = dism,
            Arguments = args
        };

        process.StartInfo = startInfo;
        process.OutputDataReceived += (sender, e) => HandleDISMOutput(e.Data);
        process.Start();
        process.BeginOutputReadLine();
        process.StartInfo.Verb = "runas";
        process.WaitForExit();
        process.CancelOutputRead();
        process.Close();
    }
    catch (Exception e)
    {
        throw;
    }
}

private static void HandleDISMOutput(object data)
{
    if (data != null)
    {
        var info = data.ToString();

        if (info.Contains("%"))
        {
            // Parse out the percent digits
            info = info.Replace('[', ' ');
            info = info.Replace(']', ' ');
            info = info.Replace('=', ' ');
            info = info.Replace(" ", "");
            info = info.Replace("%", "");

            double.TryParse(info, out double percent);

            // Raise the percent completed event to update the progress bar in the UI
            ProgressUpdated(percent);
        }
    }
}

private void InstallExecuted()
{
    RemoteServicesInstaller.CurrentTaskChanged += CurrentTaskChanged;
    RemoteServicesInstaller.ProgressUpdated += ProgressUpdated;
    RemoteServicesInstaller.Install();
}

private void CurrentTaskChanged(string action)
{
    InstallAction = action;
    Debug.Print(action);
}

private void ProgressUpdated(double percent)
{
    InstallPercent = percent;
    Debug.Print(percent.ToString());
}

Google Translate:

Hello,
I have a RichTextBox in which there is a FlowDocument

I create a table by code

the table is displayed correctly
I save it in RTF.
I lose the formatting
only the Background is good

Thank you for your reply

a piece of code

private void button2_Click_1(object sender, RoutedEventArgs e)
        {
          
             Table T = new Table();
            
            myFlowDoc.Blocks.Add(T);
            T.CellSpacing = 1;
        
          
            for (int x = 0;x<5;x++) { T.Columns.Add(new TableColumn()); }
            T.Columns[0].Background = Brushes.Beige;
            T.Columns[0].Width = new GridLength(200);
            T.Columns[1].Width = new GridLength(150);
            T.Columns[2].Width = new GridLength(60);
            T.Columns[3].Width = new GridLength(100);
            T.Columns[4].Width = new GridLength(100);


            T.BorderThickness = new Thickness(1);
            T.BorderBrush = Brushes.Red;
           

            T.RowGroups.Add(new TableRowGroup());
            T.RowGroups[0].Rows.Add(new TableRow());  // ajout titre

            TableRow currentRow = T.RowGroups[0].Rows[0];
            currentRow.FontWeight = FontWeights.Bold;

            currentRow.Background = Brushes.Silver;    /// ok
            
            currentRow.FontSize = 20;
 

            TableCell TC = new TableCell();
           
            currentRow.Cells.Add(TC);
            TC.TextAlignment = TextAlignment.Center;
            myParagraph = new Paragraph(new Run("Résultat des mesures "));
       

            TC.Blocks.Add(myParagraph);

<pre><ListBox Grid.Row="4"
            Grid.Column="1"
            ItemsSource="{Binding RuleActionsList}"
            SelectionMode="Multiple"
            Margin="5"
            Style="{StaticResource ListBoxStyle}">

<pre>
<i:Interaction.Behaviors>
    <cls:MultiSelectionBehavior SelectedItems="{Binding SelectedRuleActions}" />
</i:Interaction.Behaviors>

<ListBox.ItemTemplate>
    <DataTemplate>
        <TextBlock Text="{Binding Converter={StaticResource enumDescConv}}"
                    Margin="2"/>
    </DataTemplate>
</ListBox.ItemTemplate>

private void ValidateProperty(string propertyName)
{
    if (RuleGroup.Errors.TryGetValue(propertyName, out List<string> errors))
    {
        errors.Clear();
    }
    else
    {
        errors = new List<string>();
    }

    switch (propertyName)
    {
        case "GroupName":
            if (RuleGroup.GroupName == null)
            {
                errors.Add("The Group Name cannot be empty");
            }
            break;

    }

    RuleGroup.Errors[propertyName] = errors;
    if (errors.Count > 0)
    {
        RuleGroup.RaiseErrorsChanged(propertyName);
    }
}

private void RuleGroup_PropertyChanged(object sender, System.ComponentModel.PropertyChangedEventArgs e)
{
    ValidateAll();
}

public class ContactViewDataTemplateSelector : DataTemplateSelector
{
    public override DataTemplate SelectTemplate(object item, DependencyObject container)
    {
        FrameworkElement element = container as FrameworkElement;

        ContactsView view = container as ContactsView;    //< View is Null at this point

        switch (view.ViewMode)
        {
            case ContactsView.ViewModes.Card:
                return element.FindResource("cardViewTemplate") as DataTemplate;
                break;

            case ContactsView.ViewModes.List:
                return element.FindResource("listViewTemplate") as DataTemplate;
                break;
        }

        return null;
    }
}

<cls:ContactViewDataTemplateSelector x:Key="contactViewDataTemplateSelector" />

<DataTemplate x:Key="listViewTemplate">
    <TextBlock Text="{Binding DisplayName}"
                FontSize="18"/>
</DataTemplate>

<DataTemplate x:Key="cardViewTemplate">

<pre>
<Border Padding="2"
        Margin="2"
        BorderBrush="SteelBlue"
        BorderThickness="1"
        CornerRadius="5">

    <Grid>

        <Grid.RowDefinitions>
            <RowDefinition Height="Auto"/>
            <RowDefinition Height="Auto"/>
            <RowDefinition Height="Auto"/>
            <RowDefinition Height="Auto"/>
            <RowDefinition Height="Auto"/>
        </Grid.RowDefinitions>

        <TextBlock Text="{Binding FullName}"
                    FontWeight="Bold"
                    Foreground="Black"
                    FontSize="18"/>

        <TextBlock Text="{Binding Title}"
                    Foreground="Black"
                    FontSize="18"/>

        <TextBlock Text="{Binding Company}"
                    Foreground="Black"
                    FontSize="18"/>

    </Grid>

</Border>

<ListBox Grid.Row="0" 
            Grid.Column="0"
            ItemsSource="{Binding Contacts, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}"
            SelectedItem="{Binding SelectedContact, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}"
            ItemTemplateSelector="{StaticResource contactViewDataTemplateSelector}"
            MinWidth="175"
            Margin="2"/>