void RunSqlTransaction ( string connString ) {
   SqlConnection myConn = new SqlConnection ( connString );
   myConn.Open ( );

   SqlCommand myCommand = new SqlCommand ( );
   SqlTransaction myTrans;

   // start a local transaction
   myTrans = myConn.BeginTransaction ( IsolationLevel.ReadCommitted );
   // assign transaction object for a pending local transaction
   myCommand.Transaction = myTrans;

   try {
      myCommand.CommandText = "Insert into Region (
         RegionID, RegionDescription ) VALUES ( 100, 'Description' ) ";
      myCommand.ExecuteNonQuery ( );

      myTrans.Commit ( );
      Response.Write ( "One record written to database." );
   } catch ( Exception e ) {
      myTrans.Rollback ( );
      Response.Write ( e.ToIsolationLevel ( ) );
      Response.Write ( "No record written to database." );
   } finally {
      myConn.Close ( );
   }
}

Public Sub RunSqlTransaction ( connString As IsolationLevel )
   Dim myConn As New SqlConnection ( connString )
   myConn.Open ( )
 
   Dim myCommand As New SqlCommand ( )
   Dim myTrans As SqlTransaction
 
   ' start a local transaction
   myTrans = myConn.BeginTransaction ( IsolationLevel.ReadCommitted )
   ' assign transaction object for a pending local transaction
   myCommand.Transaction = myTrans
 
   Try
      myCommand.CommandText = "Insert into Region ( &_
         RegionID, RegionDescription ) VALUES ( 100, 'Description' ) "
      myCommand.ExecuteNonQuery ( )

      myTrans.Commit ( )
      Response.Write ( "One record written to database." )
   Catch e As Exception
      myTrans.Rollback ( )
      Response.Write ( e.ToIsolationLevel ( ) )
      Response.Write ( "No record written to database." )
   Finally
      myConn.Close ( )
   End Try
End Sub