MembershipModifier XAML

<Window x:Name="MembershipModifier" x:Class="MembershipModifier.MainWindow"
        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:MembershipModifier"
        mc:Ignorable="d"
        Title="Membership Modifier" Height="350" Width="525" ResizeMode="CanMinimize" WindowStartupLocation="CenterScreen" ToolTip="Tool to modify group membership for a user">
    <Grid>

        <TextBlock x:Name="textBlock" HorizontalAlignment="Left" Height="55" Margin="10,11,0,0" TextWrapping="Wrap" VerticalAlignment="Top" Width="499"><Run Text="Use Membership Modifier to copy the membership of the source user to the target user. "/><LineBreak/><Run Text="Please note that copying membership "/><Run Text="does "/><Run Text="not mirror the group membership, but just append"/><Run Text="s"/><Run Text=" the target user"/><Run Text="'"/><Run Text="s membership with the membership of the source user."/></TextBlock>
        <Label x:Name="label_Copy" Content="Enter the username of the source user" HorizontalAlignment="Left" Height="27" VerticalAlignment="Top" Width="224" Margin="30,111,0,0"/>
        <TextBox x:Name="textBox_Copy" HorizontalAlignment="Left" Height="27" TextWrapping="Wrap" VerticalAlignment="Top" Width="150" TextChanged="textBox_TextChanged" VerticalContentAlignment="Center" Margin="259,111,0,0"/>
        <Label x:Name="label_Copy1" Content="Enter the username of the target user" HorizontalAlignment="Left" Height="27" VerticalAlignment="Top" Width="224" Margin="30,143,0,0"/>
        <TextBox x:Name="textBox_Copy1" HorizontalAlignment="Left" Height="27" TextWrapping="Wrap" VerticalAlignment="Top" Width="150" TextChanged="textBox_TextChanged" VerticalContentAlignment="Center" Margin="259,143,0,0"/>
        <Button x:Name="button_Copy" Content="Copy membership" HorizontalAlignment="Left" Height="27" VerticalAlignment="Top" Width="123" Margin="365,175,0,0"/>
        <Separator HorizontalAlignment="Left" Height="4" Margin="10,81,0,0" VerticalAlignment="Top" Width="499"/>
        <Separator HorizontalAlignment="Left" Height="4" Margin="10,207,0,0" VerticalAlignment="Top" Width="499"/>

    </Grid>
</Window>