Запуск программы из памяти

        private void button1_Click(object sender, EventArgs e)
        {
 
            //Get the current assembly
            Assembly assembly = Assembly.GetExecutingAssembly();
 
            //Get the assembly's root name
            string rootName = assembly.GetName().Name;
 
            //Get the resource stream
            Stream resourceStream = assembly.GetManifestResourceStream(rootName + "." + "file.exe");
 
            //Verify the internal exe exists
            if (resourceStream == null)
                return;
 
            //Read the raw bytes of the resource
            byte[] resourcesBuffer = new byte[resourceStream.Length];
 
            resourceStream.Read(resourcesBuffer, 0, resourcesBuffer.Length);
            resourceStream.Close();
 
            //Load the bytes as an assembly
            Assembly exeAssembly = Assembly.Load(resourcesBuffer);
 
            //Execute the assembly
            exeAssembly.EntryPoint.Invoke(null, null); //no parameters
        }

Stream resourceStream = assembly.GetManifestResourceStream(rootName + ".Resources." + "file.exe");

Application.SetCompatibleTextRenderingDefault(false);

using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using System.Windows.Forms;
 
namespace launcher
{
    static class Program
    {
        /// <summary>
        /// Главная точка входа для приложения.
        /// </summary>
        [STAThread]
        static void Main()
        {
            Application.EnableVisualStyles();
            Application.SetCompatibleTextRenderingDefault(false);
            Application.Run(new Form1());
        }
    }
}

exeAssembly.EntryPoint.Invoke(null, null);

Application.SetCompatibleTextRenderingDefault(false);

foreach (var exportedType in exeAssembly.ExportedTypes)
            {
                if (exportedType.Name == "Form1")
                {
                    var instance = Activator.CreateInstance(exportedType);
                    ((Form)instance).Show();
                }
            }

exeAssembly.EntryPoint.Invoke(null, null);