SearchProgramCode

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

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

        private void textBox1_TextChanged(object sender, EventArgs e)
        {
            string input = textBox1.Text;

            string output = input.Replace(' ', '+');
            string output2 = input.Replace('#', "%23");
        }

        private void comboBox1_SelectedIndexChanged(object sender, EventArgs e)
        {
            if (comboBox1.SelectedIndex == 0)
            {
                string input = textBox1.Text;
                Process.Start("www.google.bg/#newwindow=1&q=" + textBox1.Text);
            }

            if (comboBox1.SelectedIndex == 1)
            {
                string input = textBox1.Text;
                Process.Start("www.google.bg/#newwindow=1&q=" + textBox1.Text +" site:"+ comboBox1.Text);
            }

            if (comboBox1.SelectedIndex == 2)
            {
                string input = textBox1.Text;
                Process.Start("www.google.bg/#newwindow=1&q=" + textBox1.Text + " site:" + comboBox1.Text);
            }

            if (comboBox1.SelectedIndex == 3)
            {
                string input = textBox1.Text;
                Process.Start("www.google.bg/#newwindow=1&q=" + textBox1.Text + " site:" + comboBox1.Text);
            }

            if (comboBox1.SelectedIndex == 4)
            {
                string input = textBox1.Text;
                Process.Start("www.google.bg/#newwindow=1&q=" + textBox1.Text + " site:" + comboBox1.Text);
            }
        }
    }
}