MainWindow.xaml

<mah:MetroWindow x:Class="CyberCrew.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:mah="clr-namespace:MahApps.Metro.Controls;assembly=MahApps.Metro"
                 xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
                 xmlns:materialDesign="http://materialdesigninxaml.net/winfx/xaml/themes"
                 xmlns:local="clr-namespace:CyberCrew"
                 mc:Ignorable="d"
                 Title="CyberCrew"
                 Width="{x:Static SystemParameters.PrimaryScreenWidth}"
                 Height="{x:Static SystemParameters.PrimaryScreenHeight}"
                 WindowStyle="None"
                 WindowState="Maximized"
                 IgnoreTaskbarOnMaximize="True"
                 ShowTitleBar="False"
                 ResizeMode="NoResize"
                 Background="White"
                 WindowTransitionsEnabled="False">
    <Grid>
        <Frame Name="FrmMain"
               NavigationUIVisibility="Hidden"
               KeyDown="FrmMain_KeyDown" />

    </Grid>
</mah:MetroWindow>