private void button3_Click(object sender, EventArgs e)
{
TaskToDoController TaskControl = new TaskToDoController();
TaskControl.UpdateDataGridView(ref dataGridView1, ref label4, dateTimePicker2.Text);
}
//Void to add tasks to do list.
private void button1_Click(object sender, EventArgs e)
{
TaskToDoController TaskControl = new TaskToDoController();
TaskControl.AddTask(textBox1.Text, dateTimePicker1.Text, ref dataGridView1, ref label4);
}