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 WindowsFormsApplication3
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}

private void Form1_Load(object sender, EventArgs e)
{
label1.Text = "";
}

private void button1_Click(object sender, EventArgs e)
{
string cumle;
char Harf;

cumle = textBox1.Text;
Harf = Convert.ToChar(textBox2.Text);
int harfsayisi = 0;
foreach (char i in cumle)
{
if (Harf == i)
{
harfsayisi++;
}
}
label1.Text = Harf.ToString() + " Harfinin toplam sayısı: " +
harfsayisi.ToString();

}

}
}