how to link 2 programs

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C#

i had written program for notepad.....

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

namespace WindowsFormsApplication1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void newToolStripMenuItem_Click(object sender, EventArgs e)
        {
            txtMain.Clear();
        }

        private void openToolStripMenuItem_Click(object sender, EventArgs e)
        {
            openFileDialog1.ShowDialog();

System.IO.StreamReader OpenFile = new System.IO.StreamReader(openFileDialog1.FileName);

txtMain.Text = OpenFile.ReadToEnd();

OpenFile.Close();
        }

        private void saveToolStripMenuItem_Click(object sender, EventArgs e)
        {
            System.IO.StreamWriter SaveFile = new System.IO.StreamWriter(openFileDialog1.FileName);

            SaveFile.WriteLine(txtMain.Text);

            SaveFile.Close();
        }

        private void saveAsToolStripMenuItem_Click(object sender, EventArgs e)
        {
            saveFileDialog1.ShowDialog();

            System.IO.StreamWriter SaveFile = new System.IO.StreamWriter(saveFileDialog1.FileName);

            SaveFile.WriteLine(txtMain.Text);

            SaveFile.Close();
        }

        private void printToolStripMenuItem_Click(object sender, EventArgs e)
        {
            System.Drawing.Printing.PrintDocument prntDoc = new System.Drawing.Printing.PrintDocument();
        }

        private void exitToolStripMenuItem_Click(object sender, EventArgs e)
        {
            Application.Exit();
        }

        private void undoToolStripMenuItem_Click(object sender, EventArgs e)
        {
            txtMain.Undo();
        }

        private void redoToolStripMenuItem_Click(object sender, EventArgs e)
        {
            txtMain.Undo();
        }

        private void cutToolStripMenuItem_Click(object sender, EventArgs e)
        {
            txtMain.Cut();
        }

        private void copyToolStripMenuItem_Click(object sender, EventArgs e)
        {
            txtMain.Copy();
        }

        private void pasteToolStripMenuItem_Click(object sender, EventArgs e)
        {
            txtMain.Paste();
        }

        private void selectAllToolStripMenuItem_Click(object sender, EventArgs e)
        {
            txtMain.SelectAll();
        }

        private void txtMain_TextChanged(object sender, EventArgs e)
        {
           
        }

        private void menuStrip1_ItemClicked(object sender, ToolStripItemClickedEventArgs e)
        {
            
        }

       
        
    }
}

and i have written code for creating shortcut

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

namespace WindowsFormsApplication1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {

        }

        private void btnShortcut_Click(object sender, EventArgs e)
        {
            WshShell shell = new WshShell();
            IWshShortcut shortcut = (IWshShortcut)shell.CreateShortcut(@"E:\shotcut.lnk");
            shortcut.TargetPath = Application.ExecutablePath;
            shortcut.Description = "Any Description here ";
            shortcut.Save();
        }
    }
}

now how can link both this program and how can i create single app..???