OData to Organization service

Hi all,

I have this Odata query to retrieve events and I want to convert it to IOrganizationservice retriev code

Query 

/datatel_events?$filter=datatel_eventstart%20ge%202016-08-17‌ T15:00:00Z%20and%20_‌ datatel_eventcodeid_‌ value%20eq%20529c964‌ 5-34f4-e411-80df-0af‌ 087926152 

Thanks.