ef核心与"in“条件的左连接

var result = from entity1 in context.Entity1
             join entity2 in context.Entity2 on entity1.Id equals entity2.Entity1Id into joinedEntities
             from entity2 in joinedEntities.DefaultIfEmpty()
             where entity2.PropertyName in new List<int> { 1, 2, 3 }
             select new { entity1, entity2 };

var result = context.Entity1
              .GroupJoin(context.Entity2, entity1 => entity1.Id, entity2 => entity2.Entity1Id, (entity1, joinedEntities) => new { entity1, joinedEntities })
              .SelectMany(x => x.joinedEntities.DefaultIfEmpty(), (x, entity2) => new { x.entity1, entity2 })
              .Where(x => new List<int> { 1, 2, 3 }.Contains(x.entity2.PropertyName))
              .Select(x => new { x.entity1, x.entity2 });