Notes

private void button1_Click(object sender, EventArgs e)
{
openFileDialog1.Title = "dosya seciniz";
openFileDialog1.Filter = "(*.png)|*.png|(*.jpg)|*.jpg|(*.bmp)|*.bmp|(*.jpeg)|*.jpeg";
openFileDialog1.FilterIndex = 2;
openFileDialog1.InitialDirectory = @"C:Userscsprresim";
if (openFileDialog1.ShowDialog() == DialogResult.OK)
{
pictureBox1.SizeMode = PictureBoxSizeMode.StretchImage;
pictureBox1.Image = Image.FromFile(openFileDialog1.FileName);
label1.Text = openFileDialog1.FileName;


}
}

----------------------------------

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 WindowsFormsApplication8
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}

private void button1_Click(object sender, EventArgs e)
{
StreamWriter yazdir = File.AppendText(textBox1.Text);
string[] resimler = Directory.GetFiles(@"C:UserscsprDesktop", "*.jpg");
foreach (String rs in resimler)
{
yazdir.WriteLine(rs.ToString() + "t");
}
yazdir.Close();
}

private void button2_Click(object sender, EventArgs e)
{
StreamReader oku = File.OpenText(textBox2.Text);
string resimler = oku.ReadLine();
while (resimler != null)
{
listBox1.Items.Add(resimler.ToString());
resimler = oku.ReadLine();
}
}

private void listBox1_SelectedIndexChanged(object sender, EventArgs e)
{

}
}
}

-------------------------------------------------

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

namespace WindowsFormsApplication2
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}

private void button1_Click(object sender, EventArgs e)
{
Directory.CreateDirectory(@"C:UsersfurkansariDesktop"+textBox1.Text+"");
}

private void button2_Click(object sender, EventArgs e)
{
Directory.Delete(@"C:UsersfurkansariDesktopSamet");
}

private void button3_Click(object sender, EventArgs e)
{
Directory.Move(@"C:UsersfurkansariDesktopYeni Klasör",@"C:");
}


private void button4_Click(object sender, EventArgs e)
{
DateTime olustrumazamanı = Directory.GetCreationTime("Yeni Klasör");
textBox2.Text = (olustrumazamanı.ToString());
}

private void button5_Click(object sender, EventArgs e)
{
FileStream malburak = File.Create(@"C:UsersfurkansariDesktopYeni Klasör"+textBox3.Text+"");
}

private void button6_Click(object sender, EventArgs e)
{
if (Directory.Exists(@"C:UsersfurkansariDesktop"+textBox4.Text+""))
{
MessageBox.Show("Evet Bu Klasör Var");
}
else {
MessageBox.Show("Hayır BU klasör yok..!");
}
}

}
}

-----------------------------------------

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 WindowsFormsApplication6
{
public partial class Form1 : Form
{
double x, y;
string z;
public Form1()
{
InitializeComponent();
}

private void button_Click(object sender, EventArgs e)
{
Button a = ((Button)sender);
if (textBox1.Text == "0")
{
textBox1.Text = a.Text;
}
else
{
textBox1.Text = textBox1.Text + a.Text;
}
}

private void button13_Click(object sender, EventArgs e)
{
x = Convert.ToDouble(textBox1.Text);
z = "+";
textBox1.Text = " ";
}

private void button14_Click(object sender, EventArgs e)
{
x = Convert.ToDouble(textBox1.Text);
z = "-";
textBox1.Text = " ";
}

private void button15_Click(object sender, EventArgs e)
{
x = Convert.ToDouble(textBox1.Text);
z = "*";
textBox1.Text = " ";
}

private void button16_Click(object sender, EventArgs e)
{
x = Convert.ToDouble(textBox1.Text);
z = "/";
textBox1.Text = " ";
}

private void button1_Click(object sender, EventArgs e)
{
textBox1.Clear();

}

private void button12_Click(object sender, EventArgs e)
{
y = Convert.ToDouble(textBox1.Text);
if (z == "+")
{
textBox1.Text = Convert.ToString(x + y);
}
if (z == "-")
{
textBox1.Text = Convert.ToString(x - y);
}
if (z == "*")
{
textBox1.Text = Convert.ToString(x * y);
}
if (z == "/")
{
textBox1.Text = Convert.ToString(x / y);
}

}

public int value { get; set; }
}
}