private void LvPatients_MouseDown(object sender, MouseEventArgs e)
        {
            var lvItem = LvPatients.GetItemAt(e.X, e.Y);

            if (lvItem == null)
            {
                foreach (ToolStripMenuItem item in CmsPatient.Items)
                {
                    item.Enabled = !(item.Text.Equals("Edit") || item.Text.Equals("Delete"));
                }
            }
        }
        private void LvPatients_MouseMove(object sender, MouseEventArgs e)
        {
            var lvItem = LvPatients.GetItemAt(e.X, e.Y);

            if (lvItem == null)
            {
                TtDiagnosis.Hide(this);
                return;
            }

            var diagnosis = _patientList.FirstOrDefault(x => x.Id == int.Parse(lvItem.SubItems[0].Text)).Diagnosis;

            TtDiagnosis.Show($"Diagnosis: {diagnosis}", this.LvPatients, new Point(e.X + 10, e.Y + 10));
        }