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 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.