WPF generate rows and columns via C# dynamically

//xaml
<Window x:Class="WpfApp214.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:WpfApp214"
        mc:Ignorable="d"
        Title="MainWindow" Height="450" Width="800">
    <Grid x:Name="gd">
        
    </Grid>
</Window>


//cs
using System;
using System.Collections.Generic;
using System.Data.SqlTypes;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;

namespace WpfApp214
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
            Loaded += MainWindow_Loaded;
        }

        private void MainWindow_Loaded(object sender, RoutedEventArgs e)
        {
            this.WindowState = WindowState.Maximized;
            RowDefinition[] rows =
            {
                new RowDefinition{Height=new GridLength(100)},
                new RowDefinition{Height=new GridLength(100)},
                new RowDefinition{Height=new GridLength(100)},
                new RowDefinition{Height=new GridLength(100)},
                new RowDefinition{Height=GridLength.Auto },
                new RowDefinition{Height=new GridLength(2,GridUnitType.Star) }
            };

            ColumnDefinition[] columns =
            {
                new ColumnDefinition{Width=new GridLength(100)},
                new ColumnDefinition{Width=new GridLength(100)},
                new ColumnDefinition{Width=new GridLength(100)},
                new ColumnDefinition{Width=new GridLength(100)},
                new ColumnDefinition{Width=new GridLength(100)},
                new ColumnDefinition{Width=GridLength.Auto},
                new ColumnDefinition{Width=new GridLength(2,GridUnitType.Star)}
            };
            Array.ForEach(rows,row=>gd.RowDefinitions.Add(row));
            Array.ForEach(columns,col=>gd.ColumnDefinitions.Add(col));
            gd.ShowGridLines = true;
        }
    }
}