private void Updatelists()
{
ListViewGuardians.SelectedItem = null;
ListViewChildren.SelectedItem = null;
ListViewConnections.SelectedItem = null;
children = DbOperations.GetAllChildren();
ListViewChildren.ItemsSource = children;
guardian = DbOperations.GetAllGuardians();
ListViewGuardians.ItemsSource = guardian;
connections = DbOperations.GetChildGuardian();
ListViewConnections.ItemsSource = connections;
ListViewConnections.DisplayMemberPath = "Fullinformation";
classes = DbOperations.GetAllClasses();
comboBoxClass.ItemsSource = classes;
comboBoxClass.DisplayMemberPath = "ClassName";
}