private void Form1_Load(object sender, EventArgs e)
{
label1.Visible = false;
}
private void textBox1_TextChanged(object sender, EventArgs e)
{
if (textBox1.Text != "")
{
if (Convert.ToInt64(textBox1.Text) % 2 == 0)
{
label1.Text = "Number is even.";
label1.Visible = true;
}
else
{
label1.Text = "Number is not even.";
label1.Visible = true;
}
}
}