using System;
using System.Linq;
using System.Collections;
using System.Collections.Generic;

public class MainClass {
    public static void Main() {
        IEnumerable<int> ints = Enumerable.Range(1, 10);
        foreach (int i in ints)
            Console.WriteLine(i);
        int sum = ints.Sum();
        Console.WriteLine(sum);
    }
}

    

   
 

using System;
using System.Collections.Generic;
using System.Linq;
public class MainClass {
    public static void Main() {

        string[] musos = { "D G", "R W", "R W" };
        IEnumerable<string> query = musos.OrderBy(m => m.Split().Last());
    }
}

    

   
 

using System;
using System.Collections.Generic;
using System.Linq;
public class MainClass {
    public static void Main() {

        string[] musos = { "D C", "R B", "W A" };
        IEnumerable<string> query = musos.OrderBy(m => m.Split().Last());
    }
}

    

   
 
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

public class MainClass{
public static void Main() {

            int[] numbers = { 5, 4, 1, 3, 9, 8, 6, 7, 2, 0 };
            
            var allButFirst3Numbers = numbers.SkipWhile(n => n % 3 != 0);
            
            Console.WriteLine("All elements starting from first element divisible by 3:");
            foreach (var n in allButFirst3Numbers) {
                Console.WriteLine(n);
            }
        }
}

    

   
 
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

public class MainClass{
public static void Main() {

            int[] numbers = { 5, 4, 8, 6, 7, 2, 0 };
            
            var laterNumbers = numbers.SkipWhile((n, index) => n >= index);
            
            Console.WriteLine("All elements starting from first element less than its position:");
            foreach (var n in laterNumbers) {
                Console.WriteLine(n);
            }
        }

}

    

   
 

using System;
using System.Linq;
using System.Collections;
using System.Collections.Generic;
public class MainClass {
    public static void Main() {

        string[] presidents = {"Ant", "arding", "arrison", "ayes", "Hoover", "ackson"};

        IEnumerable<string> items = presidents.SkipWhile(s => s.StartsWith("A"));

        foreach (string item in items)
            Console.WriteLine(item);
    }
}

    

using System;
using System.Linq;
using System.Collections;
using System.Collections.Generic;
public class MainClass {
public static void Main() {
string[] presidents = {“ant”, “arding”, “arrison”, “Hayes”, “Hoover”, “ackson”};
IEnumerable items = presidents.SkipWhile((s, i) => s.Length > 4 && i < 10); foreach (string item in items) Console.WriteLine(item); } } [/csharp]