MainWindow.xaml

<Window x:Name="mainWindow" x:Class="DLLGeneratorWPF.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="DLL Generator" Height="350" Width="391" Loaded="mainWindow_Loaded" HorizontalAlignment="Left" VerticalAlignment="Top">
    <Grid x:Name="mainGrid" Margin="0,0,2,0" HorizontalAlignment="Left" VerticalAlignment="Top">
        <TextBox x:Name="txtBoxClassName" HorizontalAlignment="Left" Height="23" Margin="23,41,0,0" TextWrapping="Wrap" VerticalAlignment="Top" Width="170"/>
        <Label x:Name="classLabel" Content="Class's Name" HorizontalAlignment="Left" Margin="23,15,0,0" VerticalAlignment="Top" Width="170"/>
        <Label x:Name="labelNumberFields" Content="Count Fields" HorizontalAlignment="Left" Margin="198,15,0,0" VerticalAlignment="Top" Width="156"/>
        <ComboBox x:Name="cmbBoxNumbFields" HorizontalAlignment="Left" Margin="193,41,0,0" VerticalAlignment="Top" Width="170" SelectionChanged="cmbBoxNumbFields_SelectionChanged"/>
        <Button Content="Generate DLL" HorizontalAlignment="Left" Margin="10,288,0,0" VerticalAlignment="Top" Width="361" Click="Button_Click_1"/>

    </Grid>
</Window>