Proje dosyalarını indirmek için tıklayınız.

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;

namespace WinFormsApp1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            Random rnd = new Random();
            int sayi_baslama, sayi_bitis;
            sayi_baslama = Convert.ToInt32(textBox1.Text);
            sayi_bitis = Convert.ToInt32(textBox2.Text);
            int sayi = rnd.Next(sayi_baslama, sayi_bitis);
            textBox3.Text = sayi.ToString();

            timer1.Interval = 1000;
            timer1.Enabled = true;
            label4.Text = sayi.ToString(); ;
        }

        private void timer1_Tick(object sender, EventArgs e)
        {
            int sayi;
            sayi = Convert.ToInt32(label4.Text);
            sayi--;
            if (sayi >= 0)
                label4.Text = sayi.ToString();
            else
                timer1.Enabled = false;

        }
    }
}

Proje dosyalarını indirmek için tıklayınız.

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;

namespace WinFormsApp1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void numericUpDown1_ValueChanged(object sender, EventArgs e)
        {
            label1.Text = numericUpDown1.Value.ToString();
        }

        private void textBox1_TextChanged(object sender, EventArgs e)
        {
            progressBar1.Value = textBox1.TextLength;
            label2.Text = textBox1.TextLength.ToString() + "/100";
        }
    }
}

Proje dosyalarını indirmek için tıklayınız.

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;

namespace WinFormsApp1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            pictureBox1.Load("resimler/1.jpg");
        }

        private void button2_Click(object sender, EventArgs e)
        {
            pictureBox1.SizeMode = PictureBoxSizeMode.Normal;
        }

        private void button3_Click(object sender, EventArgs e)
        {
            pictureBox1.SizeMode = PictureBoxSizeMode.StretchImage;
        }

        private void button4_Click(object sender, EventArgs e)
        {
            pictureBox1.SizeMode = PictureBoxSizeMode.AutoSize;
        }

        private void button5_Click(object sender, EventArgs e)
        {
            pictureBox1.SizeMode = PictureBoxSizeMode.Zoom;
        }

        int sira=1;
        private void button6_Click(object sender, EventArgs e)
        {
            pictureBox1.Load("resimler/"+sira+".jpg");
            sira++;
            if (sira == 5)
                sira = 1;
        }

        private void button7_Click(object sender, EventArgs e)
        {
            DialogResult sonuc = openFileDialog1.ShowDialog();
            if (sonuc == DialogResult.OK)
                pictureBox1.Load(openFileDialog1.FileName);
        }
    }
}