How to use SqlHelper class in ASP.Net

I have seen a project where my friend has used a sqlhelper.dll which make it easy to write code for inserting,Deleting and updating data.

ex:

ds=sqlhelper.ExecuteDataset(con,[StoredProcedure],parameter1,parameter2,...,parametern)

Or

sqlhelper.ExecuteNonQuery(con,[StoredProcedure],parameter1,parameter2,...,parametern)

and he haid used a dal(data access layer)

please suggest something good and easy to understand...Thanks in advance for your time to help me.