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-DataAdapter provides the bridge to connect command objects to a dataset object. -It populates the table in the dataset from the data store and also pushes the changes in the dataset back into the data store. Methods of DataAdapter: Fill - Populates the dataset object with data from the data source FillSchema - Extracts the schema for a table from the data source Update - It is use to update the data source with the changes made to the content of the dataset