<mah:MetroWindow xmlns:mah="http://metro.mahapps.com/winfx/xaml/controls" x:Class="PrototypWPFHAG.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:PrototypWPFHAG" mc:Ignorable="d" Title="Prototype" Height="450" Width="800" TitleCharacterCasing="Normal" WindowTitleBrush="Firebrick" Icon="pack://application:,,,/Images/databaseicon.png" ResizeMode="CanResizeWithGrip"> <Grid> <Border BorderBrush="Firebrick" BorderThickness="3"> </Border> <StackPanel> <TextBlock Width="120" Margin="100" Background="AliceBlue"></TextBlock> <Button Height="25" Width="44" Content="Log in"/> </StackPanel> </Grid> </mah:MetroWindow>