c# run program on background with inline event handler.

runner.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Diagnostics;
using System.Threading;
using System.Windows.Forms;
using System.ComponentModel;

namespace TestProject
{
    class runner
    {
        string appPath;
        int timeOut = 5000;

        public event EventHandler proc_finished = delegate { };

        public runner(string ap)
        {
            this.appPath = ap;
        }

        public void orntotxt(string input, string output)
        {

            var bw = new BackgroundWorker();

            bw.DoWork += (sender, args) => {
                Process proc = new Process();
                proc.StartInfo.FileName = appPath + "\\test.exe";
                proc.StartInfo.Arguments = "/a " + input + " " + output;
                proc.StartInfo.WindowStyle = System.Diagnostics.ProcessWindowStyle.Hidden;
                proc.Start();

                Thread.Sleep(1000);
                
                proc.WaitForExit(timeOut);
                if (proc.HasExited == false)
                    if (proc.Responding)
                        proc.CloseMainWindow();
                    else
                        proc.Kill();
            };
            bw.RunWorkerCompleted += (sender, args) => {
                if (args.Error != null) { }
                this.proc_finished(this, new EventArgs()); 
                
            };

            bw.RunWorkerAsync();

        }
    }
}

test.cs

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.IO;
using System.Windows.Forms;
using System.Diagnostics;

namespace TestProject
{
    public partial class TestMain: Form
    {
        string appPath = "C:\\";

        public TestMain()
        {
            InitializeComponent();
        }

        
        private void TestMain_Load(object sender, EventArgs e)
        {
            appPath = Path.GetDirectoryName(Application.ExecutablePath);

        }

        private void button1_Click(object sender, EventArgs e)
        {
            button1.Text = "Running...";
            runner rn = new runner(appPath);
            rn.proc_finished += delegate {
                textbox1.AppendText("Result Text");
                button1.Text = "Runned!";
            }; 
            rn.orntotxt("Args1", "Args2");
        }

    }
}