MyCodeSamples.NETMicrosoft Technologies and Open Source

//Class to hold outside source items 
class Grouping<T,IEnumerable> 
{
    public T Key { get; set; }
    public IEnumerable <T> Elements; 
}      
struct Sityevent { public string Name; public string Year; public string Month; }
static IEnumerable<Sityevent> events = new[]{
   new Sityevent{ Name="Spring Jaz Festival", Year = "2010", Month ="April"},
   new Sityevent{ Name="Harvest Festival", Year = "2006", Month ="September"},
   new Sityevent{ Name="Farmers Market Opening", Year = "2009", Month ="March"},
   new Sityevent{ Name="Summer Job Fair", Year = "2010", Month ="June"},
   new Sityevent{ Name="Bay.Net Meeting", Year = "2009", Month ="January"},
   new Sityevent{ Name="Programmers Convention", Year = "2010", Month ="May"},
   new Sityevent{ Name="Job Fair", Year = "2008", Month ="April"},
   new Sityevent{ Name="Chinese New Year Parade", Year = "2009", Month="February"},
   new Sityevent{ Name="Late Harvest Festival", Year = "2010", Month ="September"},
   new Sityevent{ Name="Garlic Festival", Year = "2010", Month ="August"},
   new Sityevent{ Name="Gay Parade", Year = "2009", Month ="April"},
   new Sityevent{ Name="Summer Jaz Festival", Year = "2008", Month ="July"},
   new Sityevent{ Name="OctoberFest", Year = "2008", Month ="October"}
};
In Main() instantiate objects of Type Grouping to hold each season months 
Grouping<string,IEnumerable<string>> fall=new  Grouping<string,IEnumerable<string>> 
  {Elements=new[]{"September","October","November"},Key="Fall"}; 
Grouping<string,IEnumerable<string>> winter=new Grouping<string,IEnumerable<string>> 
  {Elements = new[] {"December","January","February"},Key="Winter"}; 
Grouping<string, IEnumerable<string>> spring=new Grouping<string,IEnumerable<string>>
  {Elements = new[] {"March","April","May"},Key="Spring"}; 
Grouping<string,IEnumerable<string>> summer=new Grouping<string,IEnumerable<string>>
  {Elements = new[] {"June","July","August"},Key="Summer"}; 
Grouping<string,IEnumerable<string>>[] seasons=new[]{fall,winter,spring,summer}; 
           
//Group our city events by the key from outside source(seasons) 
var expr2 = from e in events
            from s in seasons
            where s.Elements.Contains(e.Month)
            group e by s.Key;
             
foreach (var group in expr2) 
{
   Console.Write(group.Key + "\tCount: " + group.Count().Tostring() + "\n"); 
   foreach (var item in group) 
   { 
     Console.Write(string.Format("{0,-30} {1} {2}\n",item.Name,item.Month,item.Year)); 
   } 
   Console.WriteLine("\n"); 
} 
Console.ReadLine();