Simple Text Editor in C#

Step 1: Firstly we're going to create a new Win Form Application project(I'll call it Cioban Mini Text Editor).



Step 2: To our form we will add three buttons(one for saving the file,one for reading the file,and the other for font),an openfile dialog,a savefile dialog,a font dialog, and rich textbox.Also,we'll ad a new namespace(System.IO).



Step 3: The design it's done.Let's start coding.

In my case:

button1 = open button;
button2 = save button;
button3 = the font button

This is the code

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 Cioban_Mini_Text_Editor
{
    public partial class Form1: Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        private void button1_Click(object sender, EventArgs e)
        {
            openFileDialog1.ShowDialog(); //Shows the dialog
            if (openFileDialog1.ShowDialog() == System.Windows.Forms.DialogResult.OK && openFileDialog1.FileName.Contains(".txt")) //Checks if it's all ok and if the file name contains .txt
            {
                string open = File.ReadAllText(openFileDialog1.FileName); //Reads the text from file
                richTextBox1.Text = open; //Shows the reded text in the textbox
            }
            else //If something goes wrong...
            {
                MessageBox.Show("The file you've chosen is not a text file");
            }
        }

        private void button2_Click(object sender, EventArgs e)
        {
            saveFileDialog1.ShowDialog(); //Opens the Show File Dialog
            if (saveFileDialog1.ShowDialog() == System.Windows.Forms.DialogResult.OK) //Check if it's all ok
            {
                string name = saveFileDialog1.FileName + ".txt"; //Just to make sure the extension is .txt
                File.WriteAllText(name, richTextBox1.Text); //Writes the text to the file and saves it
            }
        }
        private void button3_Click(object sender, EventArgs e)
        {
            fontDialog1.ShowDialog(); //Shows the font dialog
            if (fontDialog1.ShowDialog() == System.Windows.Forms.DialogResult.OK) {
                richTextBox1.Font = fontDialog1.Font; //Sets the font to the one selected in the dialog
            }
        }
    }
}

Enjoy

Thanks guys.