private void Btn_Click(object sender, EventArgs e)
        {
            Button btn = sender as Button;

            if (btn.Text == "")
            {
                return;
            }

            if (btn.Tag is Project)
            {
                f_Project f = new f_Project();
                f.ShowDialog();
            }
            else if (btn.Tag is Task)
            {
                Task       t = btn.Tag as Task;
                f_TaskEdit f = new f_TaskEdit(Convert.ToInt32(t.IDProject.ToString()));
                f.ShowDialog();
            }
        }
        private void mt_Project_Click(object sender, EventArgs e)
        {
            f_Project f = new f_Project();

            f.ShowDialog();
        }