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OleDbTransaction.Begin Method (IsolationLevel)

Initiates a nested database transaction and specifies the isolation level to use for the new transaction.

Namespace:  System.Data.OleDb
Assembly:  System.Data (in System.Data.dll)

public OleDbTransaction Begin(
	IsolationLevel isolevel


Type: System.Data.IsolationLevel

The isolation level to use for the transaction.

Return Value

Type: System.Data.OleDb.OleDbTransaction
A nested database transaction.


Nested transactions are not supported.

The new transaction is nested within the current transaction.

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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