Transaction

using System;
using System.Data;

using NUnit.Framework;

using BLToolkit.Data;

namespace HowTo.Data
{
    [TestFixture]
    public class Transaction
    {
        [Test]
        public void Test1()
        {
            using (DbManager db = new DbManager())
            {
                db.BeginTransaction();

                // ...

                db.CommitTransaction();
            }
        }

        [Test]
        public void Test2()
        {
            using (DbManager db = new DbManager())
            {
                db.BeginTransaction(IsolationLevel.ReadCommitted);

                // ...

                db.CommitTransaction();
            }
        }
    }
}

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
    <appSettings>
        <add
            key   = "ConnectionString"
            value = "Server=.;Database=BLToolkitData;Integrated Security=SSPI"/>
    </appSettings>
</configuration>