MainWindow.xaml

<Window x:Class="MattEland.FSharpGeneticAlgorithm.WindowsClient.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:MattEland.FSharpGeneticAlgorithm.WindowsClient"
        mc:Ignorable="d"
        Title="WPF Core C# talking to F# Tutorial by Matt Eland" 
        Width="450" Height="325"
        Background="Black"
        Foreground="White"
        d:DataContext="{d:DesignInstance local:MainViewModel}">
    <Grid Margin="10">
        <TextBlock FontFamily="Courier New" 
                   FontSize="18"
                   Text="{Binding TextGrid}"></TextBlock>
    </Grid>
</Window>