title: c# Group and then Sort list of tuple <T1,T2,T3>
body: <p>I'm new to C# and I want to sort my collection of <code>List&lt;Tuple&lt;int, string, int&gt;&gt;</code></p>
  
  <p>The user inputs data for example:</p>
  
  <pre><code>T1   T2   T3
  1  abbc   3             
  1  becky  5           
  1  betty  56           
  2  Olivia 6             
  2  abbc   3            
  2  becky  5           
  3  Olivia 675
  </code></pre>
  
  <p>I would like the sort list to look like;</p>
  
  <pre><code> ID = 1 { abbc,3|becky,5|betty,56 }        
   ID = 2 { Olivia,6|abbc,3|becky,5 }          
   ID = 3 { Olivia,675 }
  </code></pre>
  
  <p>please help i'm really stuck :)</p>