private void Schedules_Load(object sender, EventArgs e) { dataGridView1.DataSource = support.GetTechnicalSupports(); foreach (Client item in client.GetClients()) { cbbClient.Items.Add(item.FirstName + " " + item.LastName); } foreach (TechnicalSupport item in support.GetTechnicalSupports()) { cbbTech.Items.Add(item.FirstName + " " + item.LastName); } foreach (Calls item in calls.GetCalls()) { lstClient.Items.Add(item.Client.FirstName + " " + item.Client.LastName); } }