how could i get the Oracle schema information using the OracleClient class?

it works ,thank you very much. and i find another way,using the MS' System.Data.OracleClient method. first i wrote some packages in the Oracle db,and get the return value which is Cursor type.then you can get the schema information via the cursor. in the same way,i get the schema information of a specific table. if any shortcomings existed, it is too complicated, haha. but it works fast,as the stored procedure has compiled before the app runs.