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# NpgsqlConnection.BeginTransaction Method (IsolationLevel)

Begins a database transaction with the specified isolation level.

[Visual Basic]
Overloads Public Function BeginTransaction( _
ByVal level As IsolationLevel _
) As NpgsqlTransaction
[C#]
new public NpgsqlTransaction BeginTransaction(
IsolationLevel level
);

#### Parameters

level
  The isolation level under which the transaction should run.

#### Return Value

A NpgsqlTransaction object representing the new transaction.

#### Remarks

Currently the IsolationLevel ReadCommitted and Serializable are supported by the PostgreSQL backend. There's no support for nested transactions.

#### See Also

NpgsqlConnection Class | Npgsql Namespace | NpgsqlConnection.BeginTransaction Overload List