Find your serial number – Adobe Support
DataAdapter is a part of the ADO.NET Data Provider and DataAdapter provides the communication between the Dataset and the Datasource
You should try to keep connections to the data source open as briefly as possible to free resources for use by other client applications. +
DataAdapter fill causes "Operation is not valid due to
Fill (Populate) DataTable using SqlDataAdapter in C# and VB.Net
DataAdapter fill causes “Operation is not valid due to the current NFR key for Veeam Veeam is happy to provide a free NFR license for
Source: dataAdapter, Is there a way to make number start from 1 instead?