WPF

protected override IModuleCatalog CreateModuleCatalog()
        {
            DirectoryModuleCatalog catelog = new DirectoryModuleCatalog();
            catelog.ModulePath = @".\Modules";
            return catelog;
        }

protected override void ConfigureModuleCatalog()
        {
            base.ConfigureModuleCatalog();
            ModuleCatalog moduleCatalog = (ModuleCatalog)this.ModuleCatalog;
            moduleCatalog.AddModule(typeof(moduleA));
            moduleCatalog.AddModule(typeof(moduleB));
            moduleCatalog.AddModule(typeof(moduleC));
            moduleCatalog.AddModule(typeof(moduleD));
            moduleCatalog.AddModule(typeof(moduleE));
        }

if "Debug"=="$(ConfigurationName)" goto :nocopy
del "$(TargetPath).config"
copy "$(ProjectDir)\Release.config" "$(TargetPath).config"
:nocopy

<Grid>

<pre>
<Grid.RowDefinitions>
    <RowDefinition Height="Auto"/>
    <RowDefinition Height="*"/>
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
    <ColumnDefinition Width="Auto"/>
    <ColumnDefinition Width="Auto"/>
</Grid.ColumnDefinitions>

<Button Grid.Row="0" 
        Grid.Column="0"
        x:Name="connectBt"
        Height="32"
        Width="100"
        Margin="10,0,2,0"
        Click="ConnectBt_Click"
        Content="Connect"/>

<Button Grid.Row="0" 
        Grid.Column="1"
        x:Name="disconnectBt"
        Height="32"
        Width="100"
        Margin="2,10,10,10"
        Click="DisconnectBt_Click"
        Content="Disconnect"/>

<wfi:WindowsFormsHost Grid.Row="1"
                        Grid.Column="0"
                        Grid.ColumnSpan="2">
    <aforge:VideoSourcePlayer x:Name="videoSourcePlayer" 
                                Dock="Fill"/>
</wfi:WindowsFormsHost>

public partial class MainWindow : Window
{
    #region CTOR
    public MainWindow()
    {
        InitializeComponent();

        this.DataContext = this;

        videoSourcePlayer.NewFrame += VideoSourcePlayer_NewFrame;
        videoSourcePlayer.Height = 320;
        videoSourcePlayer.Width = 320;
    }
    #endregion

    #region Private Methods
    private void Connect()
    {
        FilterInfoCollection videoDevices = new FilterInfoCollection(FilterCategory.VideoInputDevice);

        if (videoDevices.Count == 0)
        {
            throw new ApplicationException();
        }

        var selectdDevice = videoDevices[0].MonikerString;
        VideoCaptureDevice videoSource = new VideoCaptureDevice(selectdDevice);

        OpenVideoSource(videoSource);
    }

    private void Disconnect()
    {
        if (videoSourcePlayer.VideoSource != null)
        {
            videoSourcePlayer.SignalToStop();
            videoSourcePlayer.WaitForStop();
        }
    }

    private void HandleNewFrame(ref Bitmap image)
    {
        //TODO: handle this later
    }

    private void OpenVideoSource(IVideoSource source)
    {
        videoSourcePlayer.SignalToStop();
        videoSourcePlayer.WaitForStop();
        videoSourcePlayer.VideoSource = source;
        videoSourcePlayer.Start();
    }
    #endregion

    #region Event Handlers
    private void Window_Unloaded(object sender, RoutedEventArgs e)
    {
        Disconnect();
    }

    private void ConnectBt_Click(object sender, RoutedEventArgs e)
    {
        Connect();
    }

    private void DisconnectBt_Click(object sender, RoutedEventArgs e)
    {
        Disconnect();
    }

    private void VideoSourcePlayer_NewFrame(object sender, ref Bitmap image)
    {
        HandleNewFrame(ref image);
    }
    #endregion
}
When I run this, the VideoSourcePlayer displays "Connecting..." but i never does. The camera moniker string is "@device:pnp:\\?\usb#vid_046d&pid_082d&mi_00#6&39ab8351&0&0000#{65e8773d-8f56-11d0-a3b9-00a0c9223196}\global". it's a Logitech USB camera. 

public class TextBoxEx : TextBox
{
    static TextBoxEx()
    {
        DefaultStyleKeyProperty.OverrideMetadata(typeof(TextBoxEx), new FrameworkPropertyMetadata(typeof(TextBoxEx)));
    }
}

<Border.BorderBrush>
    <SolidColorBrush Color="{DynamicResource BorderMediumColor}" />
</Border.BorderBrush>

<Border.BorderBrush>
    <SolidColorBrush Color="{StaticResource BorderMediumColor}" />
</Border.BorderBrush>

<DataGrid>
    <DataGrid.Columns>
        <DataGridTextColumn Header="Col1" Width="100" />
        <DataGridTextColumn Header="Col2" Width="Auto" />
        <DataGridTextColumn Header="Col3" Width="100" />
    </DataGrid.Columns>
</DataGrid>

<DataGrid LastChildFill="true">
    <Label Content="Col1" DockPanel.Dock="Left" />
    <Label Content="Col3" DockPanel.Dock="Right" />
    <Label Content="Col2" />
</DockPanel>

<DataGrid
                x:Name="ListViewFiles"
                MaxWidth="2560"
                MaxHeight="1600"
                AutoGenerateColumns="False"
                CanUserAddRows="False"
                CanUserSortColumns="True"
                CellStyle="{StaticResource Content_DataGrid_Centering}"
                DockPanel.Dock="Top"
                EnableColumnVirtualization="True"
                EnableRowVirtualization="True"
                ItemsSource="{Binding Path=CloudInterface.ListViewFile}"
                PreviewMouseLeftButtonDown="Drag_PreviewMouseLeftButtonDown"
                PreviewMouseMove="ListViewFiles_PreviewMouseMove"
                RowHeaderWidth="0"
                ScrollViewer.CanContentScroll="True"
                ScrollViewer.HorizontalScrollBarVisibility="Auto"
                ScrollViewer.VerticalScrollBarVisibility="Auto"
                SelectionMode="Single">
                <DataGrid.Columns>
                    <DataGridTextColumn Binding="{Binding ConfigItem.MostRecentConfigFile.Product}">
                        <DataGridTextColumn.HeaderTemplate>
                            <DataTemplate>
                                <DockPanel>
                                    <Label Content="{Binding Lab_Product, Source={StaticResource Resources}}" />
                                </DockPanel>
                            </DataTemplate>
                        </DataGridTextColumn.HeaderTemplate>
                        <DataGridTextColumn.ElementStyle>
                            <Style TargetType="{x:Type TextBlock}">
                                <Setter Property="Margin" Value="5" />
                                <Setter Property="Padding" Value="5" />
                            </Style>
                        </DataGridTextColumn.ElementStyle>
                    </DataGridTextColumn>
                    <DataGridTextColumn Binding="{Binding ConfigItem.MostRecentConfigFile.ArchitectureSoftwareVersion}">
                        <DataGridTextColumn.HeaderTemplate>
                            <DataTemplate>
                                <DockPanel>
                                    <Label Content="{Binding Lab_Version, Source={StaticResource Resources}}" />
                                </DockPanel>
                            </DataTemplate>
                        </DataGridTextColumn.HeaderTemplate>
                        <DataGridTextColumn.ElementStyle>
                            <Style TargetType="{x:Type TextBlock}">
                                <Setter Property="Margin" Value="5" />
                                <Setter Property="Padding" Value="5" />
                            </Style>
                        </DataGridTextColumn.ElementStyle>
                    </DataGridTextColumn>
               </DataGrid.Columns>
            </DataGrid>

I have set up the calculation program for the program, but now the problem is that I want to integrate the two classes together but it still is not compatible so you can help me! Textblock caculator not show Only one class can be implemented! code see here :

https://pastebin.com/AnKXHgvg?fbclid=IwAR3pEa1RjQrrvMNTq8wTfZNvmAwBJJehwf_6UoFK7h96lKSmpOZiatPGB9M

https://pastebin.com/qzPDwvzJ?fbclid=IwAR3dP3Ef3Lo2SSmk9sSLOzrCxy0tZC5Hczpl76SX8TmzdX2cFfr1RmWayhI

public static readonly RoutedEvent ItemChangedEvent =
            EventManager.RegisterRoutedEvent("ItemChanged",
            RoutingStrategy.Bubble,
            typeof(RoutedEventHandler),
            typeof(DropDownEntryView));

public event RoutedEventHandler ItemChanged
{
    add { AddHandler(ItemChangedEvent, value); }
    remove { RemoveHandler(ItemChangedEvent, value); }
}

private void RaiseItemChangedEvent(string newValue, string oldValue)
{
    var args = new ItemChangedEventArgs(ItemChangedEvent, newValue, oldValue);
    RaiseEvent(args);
}

public class ItemChangedEventArgs : RoutedEventArgs
{
    public string NewValue { get; private set; }

    public string OldValue { get; private set; }

    public ItemChangedEventArgs(RoutedEvent routedEvent, string newValue, string oldValue)
        : base(routedEvent)
    {
        NewValue = newValue;
        OldValue = OldValue;
    }
}

<ctrls:DropDownEntryView Grid.Column="0" 
                            Items="{Binding DataContext.EmailItems, 
                                            ElementName=clientsView,  
                                            Mode=TwoWay, 
                                            UpdateSourceTrigger=PropertyChanged}" 
                            EditBarCaption="Edit Emails..."
                            ShowEditBar="True"
                            ItemCategoryKey="email_types"
                            HorizontalAlignment="Left"
                            Width="400"
                            Margin="5">

<pre>
<i:Interaction.Triggers>
    <i:EventTrigger EventName="ItemChanged">
        <i:InvokeCommandAction Command="{Binding ElementName=clientsView, Path=DataContext.EmailItemChangedCommand}" 
                                CommandParameter="{Binding}"/>
    </i:EventTrigger>
</i:Interaction.Triggers>