AboutWindow.xaml

<Window x:Class="PC2MQTT.AboutWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        xmlns:local="clr-namespace:PC2MQTT"
        xmlns:materialDesign="http://materialdesigninxaml.net/winfx/xaml/themes"
        mc:Ignorable="d"
        Title="About" Height="531" Width="400"
        WindowStartupLocation="CenterScreen" ResizeMode="NoResize"
        
        TextElement.Foreground="{DynamicResource MaterialDesign.Brush.Foreground}"
        Background="{DynamicResource MaterialDesign.Brush.Background}"
        TextElement.FontWeight="Regular"
        TextElement.FontSize="12"
        FontFamily="{materialDesign:MaterialDesignFont}"    
    
        TextOptions.TextFormattingMode="Ideal"
        TextOptions.TextRenderingMode="Auto">
    <Grid Margin="0,0,0,1">
    <Grid.ColumnDefinitions>
        <ColumnDefinition Width="3*"/>
        <ColumnDefinition Width="77*"/>
    </Grid.ColumnDefinitions>
    <StackPanel VerticalAlignment="Center" HorizontalAlignment="Left" Height="494" Grid.Column="1" Margin="10,0,0,0">
            <TextBlock Text="PC2MQTT" FontSize="20" FontWeight="Bold" HorizontalAlignment="Center"/>
        <TextBlock x:Name="VersionTextBlock" FontSize="16" HorizontalAlignment="Center"/>
        <TextBlock Text="Developed by Jimmy White" FontSize="16" HorizontalAlignment="Center"/>
        <TextBlock FontSize="16" HorizontalAlignment="Center" TextWrapping="Wrap">
     <Run Text="GitHub Repository: "/>
     <Hyperlink NavigateUri="https://github.com/jimmyeao/PC2MQTT" RequestNavigate="Hyperlink_RequestNavigate">
         <Run Text="PC2MQTT"/>
     </Hyperlink>
        </TextBlock>
        <ListBox x:Name="EntitiesListBox" Width="350" Height="331" MouseDoubleClick="EntitiesListBox_MouseDoubleClick" >
            <ListBox.ItemTemplate>
                <DataTemplate>
                    <TextBlock Text="{Binding}" Tag="{Binding}">
                        <TextBlock.ContextMenu>
                            <ContextMenu>
                                <MenuItem Header="Copy" Click="CopyMenuItem_Click" 
                           CommandParameter="{Binding PlacementTarget.Tag, RelativeSource={RelativeSource AncestorType={x:Type ContextMenu}}}"/>
                            </ContextMenu>
                        </TextBlock.ContextMenu>
                    </TextBlock>
                </DataTemplate>
            </ListBox.ItemTemplate>

        </ListBox>
        <Button Content="Close" Width="100" Click="CloseButton_Click" Style="{DynamicResource MaterialDesignRaisedButton}"/>
    </StackPanel>

    </Grid>
</Window>