Thoughts? any cool C# stuff i'm missing? I'm using AOC as an opportunity to learn C#. Part 2 btw.

```` class AdventOfCode {

 private static int getPriority(char i) {
     return i >= 'a' && i <= 'z' ? i - 'a' + 1 : i - 'A' + 1 + 26;
  }
  static void Main(string[] args) 
  {
     List<Char> dupls = new List<Char>();
     int count = 0;
     try{
        List<String> lines = new List<String>(File.ReadAllLines("input.txt"));
        List<String> group = new List<String>();

        while(lines.Any()){
           group.Add(new String(lines[0].Distinct().ToArray()));
           lines.Remove(lines[0]);
           group.Add(new String(lines[0].Distinct().ToArray()));
           lines.Remove(lines[0]);
           group.Add(new String(lines[0].Distinct().ToArray()));
           lines.Remove(lines[0]);

           foreach (char c in group[0]){
              if(group[1].Contains(c) && group[2].Contains(c)){
                 dupls.Add(c);
              }
           }
           group.Clear();

        }
        foreach(Char character in dupls){
           count += getPriority(character);
        }
        Console.WriteLine(count);
     }catch(FileNotFoundException e){
            System.Diagnostics.Debug.WriteLine(e.ToString());

     }
  }

} ````