public static Application[] Applications {get;}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Attachmate.Reflection.Framework;
using Attachmate.Reflection.Emulation.IbmHosts;
using Attachmate.Reflection.UserInterface;
using System.Drawing;

namespace ConnectToActiveApp
{

    class MyApplication
    {


        static void Main(string[] args)
        {

            //Get all of the applications running on the system
            Application[] apps = MyReflection.Applications;

            if (apps.Length > 0)
            {
                //make all of the applications visible
                foreach (Application app in apps)
                {
                    IFrame frame = (IFrame)app.GetObject("Frame");

                    //frame.CreateView(terminal);

                    if (frame.Visible == false)
                    {
                        frame.Visible = true;
                    }
                }

            }

            Console.ReadLine();
        }
    }
}