This topic presents a brief description of the classes and components included in dotConnect for QuickBooks Online. Click on the name of each component for more information.

Core ADO.NET Classes

Class	Description
QuickBooksConnection	Establishes a connection to QuickBooks Online database and manages transactions.
QuickBooksCommand	Executes SQL statements and stored procedures at QuickBooks Online database.
QuickBooksDataReader	Exposes and reads a forward-only stream of data from QuickBooks Online database.
QuickBooksDataAdapter	Populates a DataSet and resolves updates with QuickBooks Online database.
QuickBooksParameter	Represents input, output, and return value parameters for commands.
QuickBooksException	Represents an error encountered at QuickBooks Online database. For an error encountered at the client, dotConnect for QuickBooks Online throws a .NET Framework exception.

Complementary ADO.NET Classes

Class	Description
QuickBooksCommandBuilder	A helper object that automatically generates command properties of QuickBooksDataAdapter and populates the QuickBooksParameter collection of QuickBooksCommand object.
QuickBooksConnectionStringBuilder	Constructs a connection string by assigning values to appropriate properties.

dotConnect for QuickBooks Online Auxiliary Classes

Class	Description
QuickBooksLoader	Serves to load external data into the QuickBooks Online database.
QuickBooksMonitor	Serves to monitor dynamic SQL execution in applications that use dotConnect for QuickBooks Online.