title: Check if item already exists in list<list>
body: <pre><code>List&lt;list&gt; ListA = new List&lt;list&gt;();
  ListA.Add(new list() { Date = PlayerDate, Name = PlayerName, Scorer = PlayerLe });
  lvTeamA.ItemsSource = 
  
      public class list
      {
          public string Date { get; set; }
          public string Name { get; set; }
          public string Scorer { get; set; }
      }
  </code></pre>
  
  <p>How can I check if <code>PlayerName</code> already exists in <code>ListA</code> so I can prevent adding the data again?</p>