private void dataGridView3_CellMouseDoubleClick(object sender, DataGridViewCellMouseEventArgs e)
{
int i = dataGridView1.CurrentRow.Index;
New_Task b = new New_Task(this, i);
b.Show();
}
private void Add_Click(object sender, EventArgs e)
{
New_Task a = new New_Task(this);
a.Show();
}