GraphDrawer/GraphDrawer/GraphByMatrix.xaml

<Window x:Class="GraphDrawer.GraphByMatrix"
        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:GraphDrawer"
        mc:Ignorable="d"
        Title="Graph Drawer" WindowStartupLocation="CenterScreen" ResizeMode="NoResize" Height="450" Width="500">
    <Grid>
        <Grid.RowDefinitions>
            <RowDefinition/>
            <RowDefinition Height="50"/>
        </Grid.RowDefinitions>
        <TextBox x:Name="MatrixTextBox" TextWrapping="Wrap" AcceptsReturn="True"/>
        <StackPanel Grid.Row="1" Orientation="Horizontal">
            <ComboBox Width="150" x:Name="SelectModeComboBox" VerticalAlignment="Center" Margin="10,0,0,0">
                <ComboBoxItem Content="Матрица смежности"/>
                <ComboBoxItem Content="Матрица инцидентности"/>
            </ComboBox>
            <TextBlock Text="Разделитель: запятая (,)" VerticalAlignment="Center" Margin="10,0,0,0"/>
            <Button x:Name="submitBtn" Content="Сохранить" Height="30" Margin="20,0" Width="80" Background="LightBlue" VerticalAlignment="Center" Click="submitBtn_Click"/>
            <Button x:Name="backBtn" Content="Назад" Height="30" Width="60" Margin="5,0" Background="IndianRed" Click="backBtn_Click"/>
        </StackPanel>
    </Grid>
</Window>