All

In this chapter you will learn:

How to use All operator
All with condition
Using All to determine whether an array contains only odd numbers

All operator

All determines whether all the elements of a collection satisfy a condition.

using System;// j a va  2 s  . c  o m
using System.Collections.Generic;
using System.Data;
using System.Linq;
using System.Text;


public class MainClass{

   public static void Main(string[] args){   

         String[] TestData = {"Zero", "One", "Two", "Three",
                              "Four", "Five", "Six", "Seven", 
                              "Eight", "Nine", "Ten"};

         var ThisQuery = TestData.All(ThisElement => ThisElement.Length == 4);

         Console.WriteLine("All elements have 4 characters: " + ThisQuery);
   }
}

All with condition

using System;/*from ja  v  a  2  s. co m*/
using System.Collections;
using System.Collections.Generic;
using System.Text;
using System.Linq;

public class MainClass{
   public static void Main(){
       int[] numbers = { 2, 6, 1, 56, 102 };
       Console.Write(numbers.All(e => e % 2 == 0) ? "Yes, they are" : "No, they aren't");
   }
}

All with filter

using System;// j  a v  a2  s  . c  om
using System.Collections.Generic;
using System.Linq;
using System.Text;

public class MainClass {
    public static void Main() {
        int[] numbers = { 1, 11, 3, 19, 41, 65, 19 };

        bool onlyOdd = numbers.All(n => n % 2 == 1);

        Console.WriteLine("The list contains only odd numbers: {0}", onlyOdd);
    }
}

Next chapter...

What you will learn in the next chapter: