using System;

using System.Linq;

public class Program

{

    public static void Main()

    {

        var statuses = new []{ "Pending","ToDo","Done"};

        var teams = new[]{"A Team","B Team","C Team"};

        var models = new[]{

            new { CurrentStatus = "Pending", TeamName = "A Team"  },

            new { CurrentStatus = "ToDo", TeamName = "B Team"  },

            new { CurrentStatus = "Done", TeamName = "B Team"  },

            new { CurrentStatus = "Done", TeamName = "C Team"  },

            new { CurrentStatus = "Done", TeamName = "C Team"  },

            new { CurrentStatus = "Done", TeamName = "A Team"  },

            new { CurrentStatus = "Done", TeamName = "A Team"  },

            new { CurrentStatus = "Done", TeamName = "A Team"  },

            new { CurrentStatus = "Done", TeamName = "A Team"  }

        };

        var crossJoin = statuses.SelectMany(a=>teams.Select(b=> new { CurrentStatus = a , TeamName = b }));

        var teamStatusCounts = models.GroupBy(x => new { x.CurrentStatus, x.TeamName })

                             .Select(g => new { g.Key, Count = g.Count() })

                             .ToList();

​

        var emptyGroups = crossJoin.Where(a=>

                            !teamStatusCounts.Any(b=>

                                b.Key.CurrentStatus == a.CurrentStatus 

                                && b.Key.TeamName == a.TeamName))

                            .Select(a=>new { 

                                Key = new {  a.CurrentStatus, a.TeamName  }, 

                                Count = 0 

                            });

        teamStatusCounts.AddRange(emptyGroups);

        foreach(var value in teamStatusCounts.OrderBy(a=>a.Key.TeamName).ThenBy(a=>a.Key.CurrentStatus))

        {

            Console.WriteLine(value);

        }

​

    }

}