serializable

public class AsyncSqlTestService : IAsyncSqlTestService
    {
        public int DoStuffSynchronously(int value)
        {
            using (var conn = new SqlConnection(ConfigurationManager.ConnectionStrings["testDatabase"].ConnectionString))
            {
                conn.Open();
                using (var tran = conn.BeginTransaction(IsolationLevel.Serializable))
                {
                    using (var cmd = new SqlCommand("waitfor delay '00:00:08'", conn, tran))