MainWindow.xaml

<Window x:Class="PM.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:PM"
        mc:Ignorable="d"
        Title="MainWindow" Height="768" Width="1024"
        ResizeMode="NoResize">
    <Grid>
        
        <ContentControl x:Name="contentControl" Margin="0,0,0,0"/>
        <Button x:Name="projectsList" Content="Project Items" HorizontalAlignment="Left" Margin="12,578,0,0" Grid.Row ="1" VerticalAlignment="Top" Width="234" Height="142" Grid.Column="1" Click="projectsList_Click"/>
        <Button x:Name="projectDetail" IsEnabled="{Binding ElementName=listView33, Path=SelectedItems.Count}" Content="Project Details" HorizontalAlignment="Left" Margin="256,578,0,0" Grid.Row="1" VerticalAlignment="Top" Width="234" Height="142" Grid.Column="1" Click="projectDetails_Click"/>
        <Button x:Name="beaconSpecs" Content="LBeacon Specifications" HorizontalAlignment="Left" Margin="500,578,0,0" Grid.Row="1" VerticalAlignment="Top" Width="234" Height="142" Grid.Column="1" Click="beaconSpecs_Click"/>
    </Grid>
</Window>