Begins a transaction by using the underlying provider.
Assembly: System.Data.Entity (in System.Data.Entity.dll)
The BeginTransaction method uses the Unspecified transaction isolation level. To specify a different isolation level, call BeginTransaction. This value might be interpreted differently by different underlying providers. If you want your application to be portable across multiple providers, it should explicitly specify the transaction isolation level by calling BeginTransaction.
At any particular moment there can be no more than one active transaction that was created through BeginTransaction. An attempt to call any of the BeginTransaction overloads on an EntityConnection that already has a current transaction results in an InvalidOperationException.
Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.