title: LINQ "Where" condition -> change value of property
body: <p>I have a list of meetings, inside which I have another list of attendees.</p>
  
  <p>The model is similar to this:</p>
  
  <pre><code>public class Meeting
  {
      public string Id { get; set; }
      public string Title { get; set; }
      public List&lt;User&gt; Users { get; set; }
      public DateTime StartTime { get; set; }
      public DateTime EndTime { get; set; }
  }
  </code></pre>
  
  <p>I have list of <code>Meetings</code>: <code>List&lt;Meeting&gt; meetings = GetMeetings();</code></p>
  
  <p>Now I want to mask the <code>Title</code> of the meetings where one of the users is <code>bot@domain.com</code>. I can achieve this in multiple LINQ queries but I am looking for one optimized LINQ query.</p>
  
  <p>Here's what I tried:</p>
  
  <pre><code>var maskedMeetings = meetings.Where(x = x.Users.Any(a =&gt; a.Email.Equals("bot@domain.com"))); 
  meetings = appointments.Except(maskedMeetings).ToList();
  maskedMeetings = maskedMeetings.Select(x =&gt; { x.Title = "Bot"; return x; }).ToList();
  meetings = meetings.Concat(maskedMeetings).ToList();
  </code></pre>
  
  <p>Can anyone help me find an optimized way of writing this query?</p>