using System;

using System.Linq;

using System.Reflection;

using System.Threading;

using System.Windows.Forms;

​

class Program

    {

        private static SynchronizationContext context = null;

        private static MethodInfo showMessageMethod;

        private static Form formInstance;

​

        [STAThread]

        static void Main(string[] args)

        {

            var assemblyPath = @"C:\Users\alexandru.clontea\Source\Repos\ConsoleApp1\WindowsFormsApp1\bin\Debug\WindowsFormsApp1.exe";

            var assembly = Assembly.LoadFrom(assemblyPath);

​

            var allControlTypes =  assembly.GetTypes().Where(t => t.IsSubclassOf(typeof(Form)));

            var form1Type = allControlTypes.Single(c => c.Name == "Form1");

            var formInstanceHandle = Activator.CreateInstanceFrom(assemblyPath, form1Type.ToString());

            var allMethods = form1Type.GetMethods();

            //var showMethod = allMethods.Single(m => m.Name == "Show" && !m.GetParameters().Any());

​

            showMessageMethod = allMethods.Single(m => m.Name == "ShowMessage" && m.GetParameters().Any());

            formInstance = (Form)formInstanceHandle.Unwrap();

            context = SynchronizationContext.Current;

​

            ((Form)formInstance).Shown += form_Shown;

            Application.EnableVisualStyles();

            Application.Run(formInstance);

            Console.ReadKey(false);

        }

​

        private static void form_Shown(object sender, EventArgs e)

        {

            context.Post((s) =>

            {

                showMessageMethod.Invoke(formInstance, new object[] { "eureeeka!" });

            }, null);

        }

}