DataTable Dispose??

[grip003]

I am having a major memory problem. I am loading a DataTable from a MySQL database, but when I dispose the DataTable, no memory is freed. I need to open about 70 tables and dump all the records into another database, but I keep getting an out of memory problem. Can anyone tell me how to completely empty a DataTable from memory? Here is the function I use to load my table:

 

public DataTable SelectSQL_DT(string selectStr, string dtName)
{
try
{
	MySqlConnection dbConnection = 
		new MySqlConnection(connectionString);
	dbConnection.Open();

	MySqlDataAdapter adapter = 
		new MySqlDataAdapter(selectStr, dbConnection);

	DataTable my_table = new DataTable(dtName);
	adapter.Fill(my_table);

	// Dispose of the adapter, it is no longer needed
	adapter.Dispose();

	dbConnection.Close();
	dbConnection.Dispose();
	return my_table;

}
catch (MySqlException e)
{
	throw new Exception("SQL statement execution " +
		"error!!\n\n" + "Trying statement:\n  " + selectStr +
		"\n\n" + e.Message);
}

} //end SelectSQL_DS(string selectStr, string dsName)