c# - Get complex object using IN equivalent in LINQ -

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i have list of type customer. need insert values of list in database before checking if customer same customer number exists particular client. firing query me customers there in database having customer number equal ones in list. query writing not working, here's code.

customerrepository.find(x => x.clientid == clientid)             .where(x => x.customernumber.contains(lstcustomersinserted.select(c => c.customernumber)));

keep simple:

var lstcustomernumbers = lstcustomersinserted.select(c => c.customernumber);     var res = customerrepository.where(x => x.clientid == clientid && lstcustomernumbers.any(c => c == x.customernumber));

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