Csharp/C Sharp/LINQ/Prototype

First Select Prototype

<source lang="csharp">

using System; using System.Linq; using System.Collections; using System.Collections.Generic; public class MainClass {

   public static void Main() {
       string[] presidents = {"A", "Ar", "Buc", "Bush", "Carte", "Clevel"};
       var nameObjs = presidents.Select(p => new { p, p.Length });
       foreach (var item in nameObjs)
           Console.WriteLine(item);
   }

}

</source>

Second Select Prototype

<source lang="csharp"> using System; using System.Linq; using System.Collections; using System.Collections.Generic; public class MainClass {

   public static void Main() {
       string[] presidents = {"A", "B", "Bu", "Bush", "C", "Cl"};
       var nameObjs = presidents.Select((p, i) => new { Index = i, LastName = p });
       foreach (var item in nameObjs)
           Console.WriteLine("{0}. {1}", item.Index + 1, item.LastName);
   }

}

</source>

Select Prototype: string length

<source lang="csharp"> using System; using System.Linq; using System.Collections; using System.Collections.Generic; public class MainClass {

   public static void Main() {
       string[] presidents = {"A", "Ar", "Buc", "Bush", "Carte", "Clevel"};
       var nameObjs = presidents.Select(p => new { LastName = p, Length = p.Length });
       foreach (var item in nameObjs)
           Console.WriteLine("{0} is {1} characters long.", item.LastName, item.Length);
   }

}

</source>

Where by Prototype

<source lang="csharp"> using System; using System.Linq; using System.Collections; using System.Collections.Generic; public class MainClass {

   public static void Main() {
       string[] presidents = {"Ad", "Ar", "Bu", "Bu", "Ca", "Cl"};
       IEnumerable<string> sequence = presidents.Where((p, i) => (i & 1) == 1);
       foreach (string s in sequence)
           Console.WriteLine("{0}", s);
   }

}

</source>