Belajar String

Assalamualaikum sahabat kali ini saya mau berbagi materi tentang string dalam program C# ,nah kali ini ini kita akan membuat program sederhana dengan menggunakan perintah string antara insert,remove,to upper, lower, join,split dll
nah berikut ini program sederhana yang sudah saya buat , selamat mencoba dan berkreasi

PROGRAM STRING

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;

namespace WindowsFormsApplication1

{

    public partial class Form1 : Form

    {

        string[] hasil;

        string str;

        public Form1()

        {

            InitializeComponent();

        }

        private void Form1_Load(object sender, EventArgs e)

        {

        }

        private void button1_Click(object sender, EventArgs e)

        {

            str = textBox1.Text;

            hasil = textBox1.Text.Split(' ');

            //inisial insert

            textBox2.Text=textBox1.Text.Insert(9,"!");

            //inisial remove

             textBox3.Text =str.Remove(2,1);

            //inisial ToLower

            textBox5.Text = str.ToLower();

            //inisial To Upper

            textBox4.Text =str.ToUpper();

            //inisial index of sting

            textBox6.Text=Convert.ToString(str.IndexOf("ring"));

            //inisial indexof (string,int)

            textBox7.Text = Convert.ToString(str.IndexOf("ring",5));

            //inisial last index

            textBox8.Text = Convert.ToString(str.LastIndexOf("ring"));

            //inisial last index int

            textBox9.Text = Convert.ToString(str.LastIndexOf("ring",5));

           

        }

        private void button1_Click_1(object sender, EventArgs e)

        {

            //inisial join

            textBox10.Text = string.Join(",", hasil);

            //inisial split

            textBox11.Text = hasil[0];

            textBox12.Text = hasil[1];

            //inisial substring

            textBox14.Text = str.Substring(0, 2);

            //inisial trim

            textBox13.Text = str.Trim();

        private void button2_Click(object sender, EventArgs e)

        {

            textBox1.Clear();

            textBox2.Clear();

            textBox3.Clear();

            textBox4.Clear();

            textBox5.Clear();

            textBox6.Clear();

            textBox7.Clear();

            textBox8.Clear();

            textBox9.Clear();

            textBox10.Clear();

            textBox11.Clear();

            textBox12.Clear();

            textBox13.Clear();

            textBox14.Clear();

        }

    }

}