A deferred execution query is reevaluated when you reenumerate : Deferred Query : LINQ C# Source Code

A deferred execution query is reevaluated when you reenumerate

    
 

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

        var numbers = new List<int>() { 1, 2 };

        IEnumerable<int> query = numbers.Select(n => n * 10);
        foreach (int n in query) Console.Write(n + "|"); 

        numbers.Clear();
        foreach (int n in query) Console.Write(n + "|"); 

    }
}

 
    
   
  
   

Related in same category :
• Deferred Query Execution
• How queries can be executed immediately with operators such as ToList().
• Shows how queries can be reused
• Deferred Query Execution
• Immediate Query Execution
• most query operators is that they execute not when constructed, but when enumerated