C# using DAO (Data Access Objects)

[Pragnya]

A 3 weeks ago i started learning C#. I want to use DAO in C#? where DAO is generally used? what is the use of DAO in web applications ?

Thanks

[KACY]

VB.net have optional parameters whereas putting null and "" in c# don't seem to help in the above OpenDatabase and OpenRecordset methods.

[Effren]

Data Access Object (DAO) enabled programmers to access local databases in the Microsoft Jet Database Engine format, which were primarily Indexed Sequential Access Method (ISAM) files. After DAO came RDO and then ActiveX Data Objects (ADO). These data access technologies were designed for a client / server paradigm.