title: Use IN operator in LINQ
body: <p>I have <code>List&lt;Candidate&gt; Candidates, List&lt;Seat&gt; Seats</code></p>
  
  <p>The <code>Model</code> defined as shown below</p>
  
  <pre><code> public class Seat
      {
  
           public string CollegeId { get; set; }
           public bool isFilled { get; set; }
           public string SeatType { get; set; }
           public string RollNumber { get; set; }
      }
       public class Candidate
       {
           public string RollNumber { get; set; }
           public bool isAllotted { get; set; }
           public string Quota { get; set; }
           public int CandidateRank { get; set; }
           public List&lt;OptionPriority&gt; SeatingPriorities { get; set; }
  
       }
       public class OptionPriority
       {
           public string CollegeId { get; set; }
           public int PriorityRank { get; set; }
       }
  </code></pre>
  
  <p>I need to filter <code>List&lt;Seat&gt;</code> from <code>List&lt;Seat&gt; Seats</code> where <code>Seats.CollegeId</code> IN List of CollegeID in SeatingPriorities.</p>