C#: Remove items from list by passing filters

Last update on December 20 2024 12:42:19 (UTC/GMT +8 hours)

Write a program in C# Sharp to remove items from list by passing filters.

Sample Solution:

C# Sharp Code:

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

// Define a class named LinqExercise19
class LinqExercise19
{
    // Main method, the entry point of the program
    static void Main(string[] args)
    {
        // Create a list of strings
        List<string> listOfString = new List<string>();
        // Add strings to the list
        listOfString.Add("m");
        listOfString.Add("n");
        listOfString.Add("o");
        listOfString.Add("p");
        listOfString.Add("q");

        // Display information about the program
        Console.Write("\nLINQ : Remove items from list by passing filters : ");
        Console.Write("\n--------------------------------------------------\n");

        // Select all items in the list using LINQ and display them
        var _result1 = from y in listOfString
                       select y;
        Console.Write("Here is the list of items : \n");
        foreach (var tchar in _result1)
        {
            Console.WriteLine("Char: {0} ", tchar);
        }

        // Remove all occurrences of "q" from the list using RemoveAll method and lambda expression
        listOfString.RemoveAll(en => en == "q");

        // Select and display all items in the list after removing "q"
        var _result = from z in listOfString
                      select z;
        Console.Write("\nHere is the list after removing item 'q' from the list : \n");
        foreach (var rChar in _result)
        {
            Console.WriteLine("Char: {0} ", rChar);
        }

        Console.ReadLine(); // Wait for user input before closing the program
    }
}

Sample Output:

LINQ : Remove items from list by passing filters  :                                                           
--------------------------------------------------                                                            
Here is the list of items :                                                                                   
Char: m                                                                                                     
Char: n                                                                                                     
Char: o                                                                                                     
Char: p                                                                                                     
Char: q                                                                                                     
Here is the list after removing item 'q' from the list :                                                      
Char: m                                                                                                     
Char: n                                                                                                     
Char: o                                                                                                     
Char: p 

Visual Presentation:

Flowchart:

C# Sharp Code Editor:

Click to Open Editor

Contribute your code and comments through Disqus.

Previous: Write a program in C# Sharp to Remove Items from List by creating an object internally by filtering.
Next: Write a program in C# Sharp to Remove Items from List by passing the item index.