c# - Get elements in list by condition against other list -

i have 2 lists of same object, , of different sizes.

i wan't in objects list1 tmdate not exist in list2.

public class myobj {     public myobj(datetime tmdate)     {         this.tmdate = tmdate;     }     public datetime tmdate { get; set; } }  var list1 = new list<myobj>();         var list2 = new list<myobj>();          list1.add(new myobj(new datetime(2015, 01, 01)));         list1.add(new myobj(new datetime(2015, 01, 02)));         list1.add(new myobj(new datetime(2015, 01, 03)));          list2.add(new myobj(new datetime(2015, 01, 01)));         list2.add(new myobj(new datetime(2015, 01, 02)));          var notmatchingobj =             list1.where(                 l1 => list2.any(l2 => l2.tmdate != l1.tmdate)); 

this code gives me wrong output..i want myobj tmdate 2015-01-03 in case

you try one:

var result = list1.where(item=>!list2.any(item2=>item2.tmdate==item.tmdate)); 

this list2.any(item2=>item2.tmdate==item.tmdate) returns true if there item in list2 same date item. otherwise returns false. taking it's negation, want.

on other hand list2.any(l2 => l2.tmdate != l1.tmdate) returns true if item found in list2, date not same date of l1. doesn't mean object same date l1 doesn't exist. above return true if first item check has date different l1. item in list2 may exist same date l1.