SqlBulkCopy Lets you efficiently bulk load a SQL Server table with data from another source.

 SqlBulkCopyColumnMapping Defines the mapping between a column in a instance's data source and a column in the instance's destination table.

 SqlBulkCopyColumnMappingCollection Collection of objects that inherits from .

 SqlBulkCopyColumnOrderHint Defines the sort order for a column in a instance's destination table, according to the clustered index on the table.

 SqlBulkCopyColumnOrderHintCollection Collection of objects that inherits from .

 SqlClientFactory Represents a set of methods for creating instances of the provider's implementation of the data source classes.

 SqlClientLogger Represents a SQL client logger.

 SqlColumnEncryptionCertificateStoreProvider The implementation of the key store provider for Windows Certificate Store. This class enables using certificates stored in the Windows Certificate Store as column master keys. For details, see Always Encrypted.

 SqlColumnEncryptionCngProvider The CMK Store provider implementation for using the Microsoft Cryptography API: Next Generation (CNG) with Always Encrypted.

 SqlColumnEncryptionCspProvider The CMK Store provider implementation for using Microsoft CAPI based Cryptographic Service Providers (CSP) with Always Encrypted.

 SqlCommand Represents a Transact-SQL statement or stored procedure to execute against a SQL Server database. This class cannot be inherited.

 SqlCommandBuilder Automatically generates single-table commands that are used to reconcile changes made to a with the associated SQL Server database. This class cannot be inherited.

 SqlConfigurableRetryFactory Provides different retry logic providers with a common list of transient errors.

 SqlConnection Represents a connection to a SQL Server database. This class cannot be inherited.

 SqlConnectionEncryptOption These options are used to control encryption behavior of the communication between the server and the client.

 SqlConnectionStringBuilder Provides a simple way to create and manage the contents of connection strings used by the class.

 SqlCredential provides a more secure way to specify the password for a login attempt using SQL Server Authentication. is comprised of a user id and a password that will be used for SQL Server Authentication. The password in a object is of type . cannot be inherited. Windows Authentication (Integrated Security = true) remains the most secure way to log in to a SQL Server database.

 SqlDataAdapter Represents a set of data commands and a database connection that are used to fill the and update a SQL Server database. This class cannot be inherited.

 SqlDataReader Provides a way of reading a forward-only stream of rows from a SQL Server database. This class cannot be inherited.

 SqlDependency The object represents a query notification dependency between an application and an instance of SQL Server. An application can create a object and register to receive notifications via the event handler.

 SqlError Collects information relevant to a warning or error returned by SQL Server.

 SqlErrorCollection Collects all errors generated by the .NET Framework Data Provider for SQL Server. This class cannot be inherited.

 SqlException The exception that is thrown when SQL Server returns a warning or error. This class cannot be inherited.

 SqlInfoMessageEventArgs Provides data for the event.

 SqlNotificationEventArgs Represents the set of arguments passed to the notification event handler.

 SqlParameter Represents a parameter to a and optionally its mapping to columns. This class cannot be inherited. For more information on parameters, see Configuring parameters

 SqlParameterCollection Represents a collection of parameters associated with a and their respective mappings to columns in a . This class cannot be inherited.

 SqlRetryingEventArgs Represents the set of arguments passed to the event.

 SqlRetryLogicOption Provides the retry logic parameters to create an instance of the class by using methods.

 SqlRowsCopiedEventArgs Represents the set of arguments passed to the .

 SqlRowUpdatedEventArgs Provides data for the event.

 SqlRowUpdatingEventArgs Provides data for the event.

 SqlTransaction Represents a Transact-SQL transaction to be made in a SQL Server database. This class cannot be inherited.

 SspiAuthenticationParameters Provides parameters used during SSPI authentication.

 ApplicationIntent Specifies a value for . Possible values are and .

 PoolBlockingPeriod Specifies a value for the property.

 SortOrder Specifies how rows of data are sorted.

 SqlBulkCopyOptions Bitwise flag that specifies one or more options to use with an instance of .

 SqlCommandColumnEncryptionSetting Note that these settings cannot be used to bypass encryption and gain access to plaintext data. For details, see Always Encrypted (Database Engine).

 SqlConnectionAttestationProtocol Specifies a value for Attestation Protocol.

 SqlConnectionColumnEncryptionSetting Note that these settings cannot be used to bypass encryption and gain access to plaintext data. For details, see Always Encrypted (Database Engine).

 SqlConnectionIPAddressPreference Specifies a value for IP address preference during a TCP connection.

 SqlConnectionOverrides Specifies a value for Overrides.

 SqlNotificationInfo This enumeration provides additional information about the different notifications that can be received by the dependency event handler.

 SqlNotificationSource Indicates the source of the notification received by the dependency event handler.

 SqlNotificationType Describes the different notification types that can be received by an event handler through the parameter.

 SqlClientMetaDataCollectionNames Provides a list of constants for use with the method to retrieve metadata collections.

 SqlAuthenticationInitializer Called during the opening of the first instance to specify an Authentication connection string attribute.

 SqlColumnEncryptionKeyStoreProvider Base class for all key store providers. A custom provider must derive from this class and override its member functions and then register it using , or . For details see, Always Encrypted.

 SqlRetryIntervalBaseEnumerator Generates a sequence of time intervals.

 SqlRetryLogicBase Retrieves the next time interval with respect to the number of retries if a transient condition occurs.

 SqlRetryLogicBaseProvider Applies retry logic on an operation through the or function.

 SspiContextProvider Provides the ability to customize SSPI context generation.