TestExam/WriteErase/MainWindow.xaml

<Window x:Class="WriteErase.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:WriteErase"
        mc:Ignorable="d"
        
        Title="WriteErase" Height="750" Width="1040">
    <Grid>
        <Frame Name="FrameMainWindow" NavigationUIVisibility="Hidden"/>
    </Grid>
</Window>