c# - Getting unique emails EWS Manged Web API -

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i trying retrieve emails exchange server using below code:

exchangeservice service = new exchangeservice(exchangeversion.exchange2007_sp1);          service.credentials = new webcredentials("username", "somepassword");          service.traceenabled = true;         service.traceflags = traceflags.all;          service.autodiscoverurl("username", redirectionurlvalidationcallback);           finditemsresults<item> findresults = service.finditems(wellknownfoldername.inbox, new itemview(10));         serviceresponsecollection<getitemresponse> items =             service.bindtoitems(findresults.select(item => item.id), new propertyset(basepropertyset.firstclassproperties, emailmessageschema.from, emailmessageschema.torecipients));         return items.select(item =>         {             return new mailitem()             {                 = ((microsoft.exchange.webservices.data.emailaddress)item.item[emailmessageschema.from]).address,                 recipients = ((microsoft.exchange.webservices.data.emailaddresscollection)item.item[emailmessageschema.torecipients]).select(recipient => recipient.address).toarray(),                 subject = item.item.subject,                 body = item.item.body.tostring(),             };         }).toarray();

i need save subject , body in database . need unique emails becasue don't want redundant emails display on system.

means every time synchronize system exchange server , new emails hadn't synchronized yet.

thanks

if understand right, save emails obtained ews in database. later obtain emails again , email have plus new ones?

how working timestamps? creationtime (or receivedtime) of mailitem , save in database too.

after search in ews mailitems have creationtime (or receivedtime) later last creationtime (or receivedtime) in database. new emails.


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