private void tryConnectingServer()
{
cmbDatabases.DataSource = null;
lblLoading.Visible = true;
DataTable tbll = new DataTable();
completedCallback callback = new completedCallback(updateCombo);
ThreadController controller = new ThreadController(callback);
Thread t1 = new Thread(new ThreadStart(() => controller.getDatabaseNames(txtDataSource.Text.Trim())));
t1.Start();
}
public ThreadController(completedCallback callback)
{
this._callback = callback;
}