private async void LoadInitialData() { toggleButton = new ToggleButton(); toggleButton.Location = new Point(54, 24); toggleButton.Size = new System.Drawing.Size(47, 21); groupBox1.Controls.Add(toggleButton); cbPaymentType.Items.Add("Cash"); cbPaymentType.Items.Add("Credit Card"); cbPaymentType.SelectedItem = "Cash"; cbRepeatValuesType.Items.AddRange(new string[] { "Day", "Week", "Month", "Year" }); cbRepeatValues.Items.AddRange(new string[] { "1", "2" }); cbRepeatValuesType.SelectedItem = "Week"; cbRepeatValues.SelectedItem = "1"; ContactModel ct = new ContactModel(db); var contacts = await ct.GetAllActiveContacts(); cbContacts.Items.Clear(); cbContacts.Items.AddRange(contacts); cbContacts.DisplayMember = "FullName"; cbContacts.ValueMember = "Id"; if (this.currentEditingTransaction != null) { LoadCurrentData(); } }