更改日期时间选择器背景颜色C#

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

public class CustomDateTimePicker : DateTimePicker
{
    public CustomDateTimePicker()
    {
        SetStyle(ControlStyles.UserPaint, true);
    }

    protected override void OnPaint(PaintEventArgs e)
    {
        // 绘制背景颜色
        e.Graphics.FillRectangle(new SolidBrush(BackColor), ClientRectangle);

        // 绘制文本
        TextRenderer.DrawText(e.Graphics, Text, Font, ClientRectangle, ForeColor, TextFormatFlags.VerticalCenter | TextFormatFlags.Left);

        // 绘制边框
        ControlPaint.DrawBorder(e.Graphics, ClientRectangle, BorderColor, ButtonBorderStyle.Solid);

        base.OnPaint(e);
    }
}

// 在窗体中使用自定义日期时间选择器
public class MyForm : Form
{
    public MyForm()
    {
        CustomDateTimePicker dateTimePicker = new CustomDateTimePicker();
        dateTimePicker.BackColor = Color.Yellow; // 设置背景颜色
        Controls.Add(dateTimePicker);
    }
}

// 运行窗体
Application.Run(new MyForm());