Explain in brief DataAdapter class in ADO.NET.
The DataAdapter class retrieves data from the database, keeps data in a dataset, and reflects the changes made in the dataset to the database. The DataAdapter class acts as an intermediary for all the communication among the database and the DataSet object. The DataAdapter Class is used to fill a DataTable or DataSet Object with data from the database using the Fill() method. The DataAdapter class applies the alters made in dataset to the database by calling the Update() method.