آموزش سی شارپ C# قسمت دوازدهم

 listBox1.Items.Add(textBox1.Text);

 textBox1.Clear();
textBox1.Focus();

 listBox1.Items.RemoveAt(0);

 int[] a = new int[10];

 listBox1.Items.RemoveAt(listBox1.SelectedIndex);

 textBox1.Text = listBox1.SelectedItem.ToString();

 private void button1_Click(object sender, EventArgs e)

{
    listBox1.Items.Add(textBox1.Text);

    textBox1.Clear();

    textBox1.Focus();
}

private void button2_Click(object sender, EventArgs e)

{
    int x = listBox1.SelectedIndex;

    listBox1.SelectedIndex++;

    listBox1.Items.RemoveAt(x);
}

private void listBox1_SelectedIndexChanged(object sender, EventArgs e)

{
    textBox1.Text = listBox1.SelectedItem.ToString);
}

 private void button1_Click(object sender, EventArgs e)

{
    comboBox1.Items.Add(textBox1);

    textBox1.Clear();

    textBox1.Focus();
}

private void button2_Click(object sender, EventArgs e)

{
    int x = comboBox1.SelectedIndex;

    comboBox1.SelectedIndex++;

    comboBox1.Items.RemoveAt(x);
}

private void comboBox1_SelectedIndexChanged (object sender, EventArgs e)
{
    textBox1.Text = listBox1.SelectedItem.ToString();