LINQ (C#) – All() and Any() Method Example and Tutorial

All() and Any() method are opposite in nature and used to scan whole list against the condition. Both operators scan whole list's items and returns Boolean (True, False) based on the given condition.

All() Method – All() method scans whole list and returns true if all elements match the condition. If any of them doesn't fulfil the condition then it returns false.

Condition:
True: If All elements match condition
False: If one or more elements match condition
False: If none of them match condition

Programming Example

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

namespace LinqTutorial
{
    class ProductStore
    {
        public string productName { get; set; }
        public int productPrice { get; set; }
        public int inStock { get; set; }
    }

    class Program
    {
        static void Main(string[] args)
        {
            // Creating List
            IList<ProductStore> productList = new List<ProductStore>();

            productList.Add(new ProductStore { productName = "Hard Disk", productPrice = 1280, inStock=40 });
            productList.Add(new ProductStore { productName = "Monitor", productPrice = 3000, inStock = 30 });
            productList.Add(new ProductStore { productName = "SSD Disk", productPrice = 3500, inStock = 20 });
            productList.Add(new ProductStore { productName = "RAM", productPrice = 2450, inStock = 84 });
            productList.Add(new ProductStore { productName = "Processor", productPrice = 7680, inStock = 23 });
            productList.Add(new ProductStore { productName = "Bluetooth", productPrice = 540, inStock = 45 });
            productList.Add(new ProductStore { productName = "Keyboard & Mouse", productPrice = 1130, inStock = 34 });

            //LINQ Method Syntax
            var result = productList.All(p => p.inStock > 10);
            Console.Write("All Product in Stock: ");
            Console.WriteLine(result);
            
            
            Console.ReadKey();
        }
    }
}

All Product in Stock: True
_

Any() Method

Any() Method scans whole list and returns true if any of the elements or all elements match the condition. If none of them match the condition then it returns false.

Condition:
True: If All elements match condition
True: If one or more elements match condition
False: If none of them match condition

Programming Example

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

namespace LinqTutorial
{
    class ProductStore
    {
        public string productName { get; set; }
        public int productPrice { get; set; }
        public int inStock { get; set; }
    }

    class Program
    {
        static void Main(string[] args)
        {
            // Creating List
            IList<ProductStore> productList = new List<ProductStore>();

            productList.Add(new ProductStore { productName = "Hard Disk", productPrice = 1280, inStock=40 });
            productList.Add(new ProductStore { productName = "Monitor", productPrice = 3000, inStock = 30 });
            productList.Add(new ProductStore { productName = "SSD Disk", productPrice = 3500, inStock = 20 });
            productList.Add(new ProductStore { productName = "RAM", productPrice = 2450, inStock = 84 });
            productList.Add(new ProductStore { productName = "Processor", productPrice = 7680, inStock = 23 });
            productList.Add(new ProductStore { productName = "Bluetooth", productPrice = 540, inStock = 45 });
            productList.Add(new ProductStore { productName = "Keyboard & Mouse", productPrice = 1130, inStock = 34 });

            //LINQ Method Syntax
            var result = productList.Any(p => p.inStock > 300);
            Console.Write("All Product in Stock: ");
            Console.WriteLine(result);
            
            
            Console.ReadKey();
        }
    }
}

All Product in Stock: False
_

Summary

In this tutorial, I have tried to explain LINQ All() and Any() method with the help of complete programming example. In the next chapter, you will learn LINQ Range Operator.