public ADCommand(string cmdText, ADConnection connection, ADTransaction txn)
 {
     m_cmdText = cmdText;
     m_connection = connection;
     m_txn = txn;
 }
 // Implement other constructors here
 public ADCommand(ADConnection connection)
 {
     m_connection = connection;
 }
 public ADCommand(string cmdText, ADConnection connection)
 {
     m_cmdText = cmdText;
     m_connection = connection;
 }
 internal ADDataReader(string cmdText, ADConnection connection)
 {
     m_connection = connection;
 }