Linq Left Outer Join

Question

I am new to LINQ and am trying to convert a SQL query to LINQ:

SQL:

left outer join PRODUCT_BEST_USE pbu on pbu.PRODUCT_GUID = @uProductId and pbu.BEST_USE_GUID = bu.BEST_USE_GUID 

LINQ:

from PBU in PRODUCT_BEST_USE.Where(PBU=>PBU.PRODUCT_GUID == p.PRODUCT_GUID).DefaultIfEmpty() 

When I add and PBU.BEST_USE_GUID equals BU.BEST_USE_GUID, I get an error:

"A query body must end with a select clause or a group clause"

Here is the full Linq query:

from p in PRODUCT
join BU in BEST_USE on p.CATEGORY_GUID equals BU.CATEGORY_GUID
from PBU in PRODUCT_BEST_USE.Where(PBU=>PBU.PRODUCT_GUID == p.PRODUCT_GUID).DefaultIfEmpty() 
where p.PRODUCT_GUID == new Guid("d317752b-581d-4f43-92fa-4a4af91009f5")
select new 
        {
            BU.NAME, 
            Include = PBU.PRODUCT_BEST_USE_GUID == null ? Convert.ToBoolean("False") : Convert.ToBoolean("True")
        }