C# Winform同时启动多个窗体类

首先创建一个类，存放将要同时显示的窗体

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace WindowsFormsApplication1
{
    class MultiFormApplictionStart : ApplicationContext
    {
        /// <summary>
        /// 多窗口同时启动类
        /// <remarks>继承ApplicationContext的原因是Application.Run(ApplicationContext context);参数的需要</remarks>
        /// <remarks>另一个是关闭同时启动的窗口</remarks>
        /// </summary>
        private void onFormClosed(object sender, EventArgs e)
        {
            if (Application.OpenForms.Count == 0)
            {
                ExitThread();
            }
        }

        public MultiFormApplictionStart()
        { 
            //将要显示的窗体集合
            var formList = new List<Form>(){
                new Form1(),
                new Form2()
            };

            foreach (var item in formList)
            {
                item.FormClosed += onFormClosed;
            }

            foreach (var item in formList)
            {
                item.Show();
            }
        }
    }
}

主程序Program更改为

using System;
using System.Collections.Generic;
using System.Linq;
using System.Windows.Forms;

namespace WindowsFormsApplication1
{
    static class Program
    {
        /// <summary>
        /// 应用程序的主入口点。
        /// </summary>
        [STAThread]
        static void Main()
        {
            Application.EnableVisualStyles();
            Application.SetCompatibleTextRenderingDefault(false);
            Application.Run(new MultiFormApplictionStart());    //调用用于显示窗体的类
        }
    }
}

最终效果图