private void btn_Create_Click(object sender, EventArgs e) { lbl_HomeNameError.Visible = false; lbl_RoomListError.Visible = false; if (tb_HomeName.Text == null || tb_HomeName.Text.Trim() == "") { lbl_HomeNameError.Visible = true; lbl_HomeNameError.Text = "Name can't be empty!"; return; } if (listBox_Rooms.Items.Count == 0) { lbl_RoomListError.Visible = true; lbl_RoomListError.Text = "Please put rooms!"; return; } name = tb_HomeName.Text; if (tb_Address.Text != "") { address = tb_Address.Text; } else { address = " "; } name = tb_HomeName.Text; Home home = new Home(user, name, rooms, address); form.ShowHomeSidebar(home); this.Parent.Controls.Remove(this); }