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I have done a company-office-contactperson solution on our website. On a company page you specify in what cities that company reside in the form of a LinkItemCollection. The problem started today after I made a small update to the website (= recycling of the application pool), all the contact options just disappeared. After republish of each of the company pages they reappeared and went away after the next application pool recycle.Back to the development environment for debugging. Checked everything, the value in the database etc. Nothing was wrong. After more head scratching I remembered reading the deployment checklist by Alexander Haneng (great read btw). I had changed the stringDelayedLoadThreshold from 0 to 50. When I changed this value back all worked like a charm again.
It all works fine with 50 as value on the actual page itself but when getting children with either FindPagesWithCriteria or GetChildren extension method I get null returned from the LinkItemCollection property. If anyone can shed some light on the differences I would appreciate it.
So be careful setting the stringDelayedThreshold if you are working with LinkItemCollections.