progreess bar using threding

private void button1_Click(object sender, EventArgs e)

 {

 for (int i = 1; i <= 100; i++)

 {

 Thread. Sleep(10);

 progressBar1.Value = i;

 }

 }

days calculation

private void linkLabel1_LinkClicked(object sender, LinkLabelLinkClickedEventArgs e)

        {

            textBox1.Text = DateTime.Now.ToShortDateString();

          

        }

        private void linkLabel2_LinkClicked(object sender, LinkLabelLinkClickedEventArgs e)

        {

            textBox2.Text = DateTime.Now.ToShortDateString();

        }

     

        private void button1_Click(object sender, EventArgs e)

        {

            TimeSpan t;

            t = Convert.ToDateTime(textBox2.Text) - Convert.ToDateTime(textBox1.Text);

            label1.Text = t.TotalDays.ToString();

        }

time difference

private void linkLabel1_LinkClicked(object sender, LinkLabelLinkClickedEventArgs e)

        {

            textBox1.Text = DateTime.Now.ToString();

        }

        private void linkLabel2_LinkClicked(object sender, LinkLabelLinkClickedEventArgs e)

        {

           textBox2.Text= DateTime.Now.ToString();

        }

        private void button1_Click(object sender, EventArgs e)

        {

            TimeSpan ts;

            ts = Convert.ToDateTime(textBox2.Text) - Convert.ToDateTime(textBox1.Text);

            textBox3.Text = ts.ToString();

        }

display time &date

private void button1_Click(object sender, EventArgs e)

        {

            textBox1.Text = DateTime.Now.ToString();

            textBox2.Text = DateTime.Now.ToShortTimeString();

            textBox3.Text = DateTime.Now.ToShortDateString();

        }

numericUpDown

private void numericUpDown1_ValueChanged(object sender, EventArgs e)

        {

            label4.Text = numericUpDown1.Value.ToString();

        }

Swap Panels

  private void Form1_Load(object sender, EventArgs e)

        {

            panel2.Visible = false;

        }

        private void button1_Click(object sender, EventArgs e)

        {

            if (panel1.Visible == true)

            {

                panel2.Visible = true;

                panel1.Visible = false;

            }

            else

            {

                panel1.Visible = true;

                panel2.Visible = false;

            }

            

        }

selectio of two radio buttons in windows forms

1. take two radio buttons

And two checkboxes

If radiobutton1 pressed then automatically it checks the first checkbox and enters that value to textbox

In the same way second also. If two radio buttons checked then place two values in textbox

Code it in windows forms

use pannels

private void radioButton1_CheckedChanged(object sender, EventArgs e)

        {

          

            if (radioButton1.Checked == true)

            {

                checkBox1.Checked = true;

                textBox1.Text += checkBox1.Text;

            }

            else

            {

                checkBox1.Checked = false;

            }

        }

        private void radioButton2_CheckedChanged(object sender, EventArgs e)

        {

        

            if (radioButton2.Checked == true)

            {

                checkBox2.Checked = true;

                textBox1.Text += checkBox2.Text;

            }

            else

            {

                checkBox2.Checked = false;

            }

        }