C# WinForm 全屏，不带任务栏，带任务栏

    public partial class Form1 : Form
    {
        public Form1()
        {
            //可交换顺序（方式1）
            this.FormBorderStyle = FormBorderStyle.None;
            this.WindowState = FormWindowState.Maximized;
            InitializeComponent();
            //可交换顺序（方式2）
            this.FormBorderStyle = FormBorderStyle.None;
            this.WindowState = FormWindowState.Maximized;
        }
        private void Form1_Load(object sender, EventArgs e)
        {
            //不可交换顺序（方式3）
            this.FormBorderStyle = FormBorderStyle.None;
            this.WindowState = FormWindowState.Maximized;
        }
    }

    public partial class Form1 : Form
    {
        public Form1()
        {

            InitializeComponent();

        }
        private void Form1_Load(object sender, EventArgs e)
        {
            //不可交换顺序
            this.WindowState = FormWindowState.Maximized;
            this.FormBorderStyle = FormBorderStyle.None;
        }
    }