Answer / purushotham

mcommand is DataAdapter

DataAdapter object is like a bridge that links the database
and a Connection object with the ADO.NET-managed DataSet
object through its SELECT and action query Commands. It
specifies what data to move into and out of the DataSet.
Often, this takes the form of references to SQL statements
or stored procedures that are invoked to read or write to a
database.
The DataAdapter provides four properties that allow us to
control how updates are made to the server:
* SelectCommand
* UpdateCommand
* InsertCommand
* DeleteCommand

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