如何在赋值为DataGridView后更改RichTextBox的背景色

using System;
using System.Drawing;
using System.Windows.Forms;

public class MainForm : Form
{
    private DataGridView dataGridView;
    private RichTextBox richTextBox;

    public MainForm()
    {
        InitializeComponent();
    }

    private void InitializeComponent()
    {
        this.dataGridView = new DataGridView();
        this.richTextBox = new RichTextBox();
        this.SuspendLayout();

        // 设置DataGridView属性
        this.dataGridView.Location = new Point(10, 10);
        this.dataGridView.Size = new Size(300, 200);

        // 设置RichTextBox属性
        this.richTextBox.Location = new Point(10, 220);
        this.richTextBox.Size = new Size(300, 100);

        // 添加控件到窗体
        this.Controls.Add(this.dataGridView);
        this.Controls.Add(this.richTextBox);

        // 初始化数据
        InitializeData();

        this.ResumeLayout(false);
    }

    private void InitializeData()
    {
        // 假设这里有一些数据源
        var data = new DataTable();
        data.Columns.Add("Name");
        data.Columns.Add("Age");

        data.Rows.Add("Alice", 30);
        data.Rows.Add("Bob", 25);

        // 赋值给DataGridView
        this.dataGridView.DataSource = data;

        // 更改RichTextBox的背景色
        this.richTextBox.BackColor = Color.LightYellow;
    }

    [STAThread]
    static void Main()
    {
        Application.EnableVisualStyles();
        Application.SetCompatibleTextRenderingDefault(false);
        Application.Run(new MainForm());
    }
}