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IEnumerable variables in LINQ Queries in C#

  1. Forget Code
  2. C#
  3. IEnumerable variables in LINQ Queries
When you see a query variable that is typed as IEnumerable<Customer>, it just means that the query, when it is executed, will produce a sequence of zero or more Customer objects.

Example: 
  1. using System;
  2. using System.Collections.Generic;
  3. using System.Linq;
  4. using System.Text.RegularExpressions;
  5.  
  6. namespace ForgetCode
  7. {   
  8.     public class MainClass
  9.     {
  10.         public static void Main()
  11.         {
  12.             // Load your DB file here
  13.             IEnumerable<Customer> customerQuery =
  14.             from cust in customers
  15.             where cust.City == "London"
  16.             select cust;
  17.  
  18.             foreach (Customer customer in customerQuery)
  19.             {
  20.                 Console.WriteLine(customer.LastName + ", " + customer.FirstName);
  21.             }
  22.         }
  23.     }
  24. }