[Edit]

C# / .NET - iterate over List and remove indicated items

1 contributors

2 contributions

0 discussions

0 points

Created by:

Zeeshan-Peel

850

In this article, we would like to show you how to iterate over List and remove indicated items in C#.

Quick solution:

xxxxxxxxxx
 
List<string> myList = new List<string> { "A", "B", "C" };
​
for (int i = myList.Count - 1; i >= 0; i--)
    if (myList[i] == "B")
        myList.RemoveAt(i);

or:

xxxxxxxxxx
 
List<string> myList = new List<string> { "A", "B", "C" };
​
myList.RemoveAll(item => item == "B");

1. Practical example using `for` loop with `RemoveAt()` method

Edit

In this example, we use RemoveAt() method to remove indicated items by index when the value matches the criteria.

xxxxxxxxxx
 
using System;
using System.Collections.Generic;
​
public class Program
{
    public static void Main()
    {
        List<string> myList = new List<string> { "A", "B", "C" };
​
        for (int i = myList.Count - 1; i >= 0; i--)
        {
            if (myList[i] == "B")
                myList.RemoveAt(i);
        }
​
        // Print results
        foreach (string item in myList)
            Console.WriteLine(item);
    }
}

Output:

xxxxxxxxxx
 
A
C

2. Using `RemoveAll()` method

Edit

In this example, we use RemoveAll() method to remove indicated items when they match the criteria.

xxxxxxxxxx
 
using System;
using System.Collections.Generic;
​
public class Program
{
    public static void Main()
    {
        List<string> myList = new List<string> { "A", "B", "C" };
​
        myList.RemoveAll(item => item == "B");
​
        // Print results
        foreach (string item in myList)
            Console.WriteLine(item);
    }
}