Get default value type (DateTime) in Linq to Sql query with empty results

Question

I am having a problem returning a default DateTime value from a complex Linq-to-Sql query.

Hopefully the following simplified example shows the

Answer 1

users.Select(u =>
  new MyDomainObject(
     u.Id,
     u.Transactions
        .Where(t => false) // empty results set
        .Select(t => t.TransactionTime)
        .Any() ?
     u.Transactions
        .Where(t => false) // empty results set
        .Select(t => t.TransactionTime) // TransactionTime is DATETIME NOT NULL
        .OrderByDescending(x => x)
        .FirstOrDefault() : // I want DateTime.MinValue (or SqlDateTime.MinValue)
     DateTime.MinValue
  )
);

This will supply DateTime.MinValue if there are no transactions available for that object.