this.Hide(); Event with Form1 load

Hi,
there are few things, first of all you are doing all in a bundle, so you need to split them into tasks that does individual components such as:
1) Load First Form;
2) Start the Background worker to read the file, so that the form1 is responsive;
3) Read the file;
4) On background worker completed, invoke a delegate so that the resources are not caught in the cross thread operation;
5) process the results in the main thread;
6) initiate the second form;
7) show the new form;
8) hide the main form.

See code below:

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.IO;
using System.Windows.Forms;

namespace SecondFormOnFormLoad
{
    public partial class Form1 : Form
    {
        private delegate void BGWorkerCompletedCallback();

        private string _fileName = @"D:\Projects\VS_Test_Projects\CodeProjectTests\SecondFormOnFormLoad\bin\Debug\cfg.ini";
        private string _errorMsg;
        private List<string> _contentsOfIniFile;

        /// <summary>
        /// Basic const.
        /// </summary>
        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Shown(object sender, EventArgs e)
        {
            backgroundWorker1.RunWorkerAsync();
        }

        private void backgroundWorker1_DoWork(object sender, DoWorkEventArgs e)
        {
            // give some time just to show that the form has loaded.
            System.Threading.Thread.Sleep(500);
            ReadFile();
        }

        private void ReadFile()
        {
            _errorMsg = null;
            FileInfo fi = new FileInfo(_fileName);
            if (!fi.Exists)
            {
                _errorMsg = "File doesn't exists!";
            }
            else
            {
                _contentsOfIniFile = new List<string>();
                using (StreamReader sr = new StreamReader(_fileName, System.Text.Encoding.Default))
                {
                    string str = "";
                    while ((str = sr.ReadLine()) != null)
                    {
                        _contentsOfIniFile.Add(str);
                    }
                }
            }
        }

        private void backgroundWorker1_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
        {
            BGWCompletedHandler();
        }


        private void BGWCompletedHandler()
        {
            new BGWorkerCompletedCallback(TaskCompleted).Invoke();
        }

        private void TaskCompleted()
        {
            if (_contentsOfIniFile.Count > 0)
            {
                CheckContentAndOpenNewForm();
            }
            else if (!string.IsNullOrEmpty(_errorMsg))
            {
                MessageBox.Show(_errorMsg);
            }
        }

        private void CheckContentAndOpenNewForm()
        {
            string[] parts = _contentsOfIniFile[0].Split(new char[] { '=' });

            if (parts.Length > 0)
            {
                if (parts[0].Contains("Hello World"))
                {
                    Form2 frm = new Form2();

                    if (parts[1].Trim().Equals("1"))
                    {
                        frm.Show(this);
                        this.Hide();
                    }
                }
            }
        }
        
    }
}

This works like a sweet.

Regards
Jegan