Linq, isolation level

[imbirek8]

Hi, I wrote code that would read data from db in readUncommited isolation
level.
I'm not sure, that I've done and understand it correctly, could you see my
code and tell your opinion ?
Can I define two scope in different isolation level in one transaction ?

class Program
{
static void Main(string[] args)
{
try
{
string connectionStrin g = "Data
Source=WIN2003\ \SQLEXPRESS;Ini tial Catalog=test;In tegrated Security=True";
DataClassesData Context db = new
DataClassesData Context(connect ionString); //declare my connection
TransactionOpti ons option = new TransactionOpti ons()
//declare my isolation level
{
IsolationLevel =
System.Transact ions.IsolationL evel.ReadUncomm itted
};
TransactionScop e scope = new
TransactionScop e(TransactionSc opeOption.Requi red, option); //create
transaction scope
Operation(db); //do something
scope.Complete( ); //commit transactionScop e, but not
transaction

TransactionScop e scope2 = new
TransactionScop e(TransactionSc opeOption.Requi red, option); //create another
scope, but I use TransactionScop eOption.Require d so I use the same
transaction
Operation(db); //do something
scope2.Complete (); //commit this scope

db.SubmitChange s(); //here I commit all transaction
}
catch (Exception e)
{
db.Dispose(); //rollBack all transaction
}
}
public static void Operation(DataC lassesDataConte xt db)
{
var select = from u in db.tUsers
where u.userId == 1
select u;
List<tUserlista Tmp = new List<tUser>(sel ect);
foreach (var u in listaTmp)
Console.WriteLi ne(u.userName);
}
}

Thank you for help