Close Application at Press of Escape Button

There are various ways to close an application by pressing the Escape button, using C#. Here are a few:

• Way 1: Simply add the below given code in your Windows program:

protected override bool ProcessCmdKey(ref Message msg, Keys keyData)
{
    if (keyData == Keys.Escape) this.Close();
        bool res = base.ProcessCmdKey(ref msg, keyData);
    return res;
}

• Way 2: Write the below code in the KeyPress event of a form:

if (e.KeyChar == (char)27)
    this.Close();

• Way 3: Select properties of Form and select 'KeyPreview' and change it from 'false' to 'true'. [By default, its value is false.] Then write the below code in the KeyUp event of the Form:

private void Form1_KeyUp(object sender, KeyEventArgs e)
{
    if (e.KeyCode == Keys.Escape)
        this.Close();
}