using (MyDbContext dbContext = new MyDbContext())
{
    using (TransactionScope txScope = new TransactionScope(TransactionScopeAsyncFlowOption.Enabled))
    {
        dbContext.Database.ExecuteSqlCommand("EXEC UpdateProc @Parm1 = 1;");
        var testObject = (from t in dbContext.TestTable where ID == 1 select t).FirstOrDefault();

        txScope.Complete();
    }
}