How to use Remove, RemoveAt, RemoveRange methods in C# list collections?

To implement Remove() and RemoveAt() methods in C#, try the following code −

Firstly, set a list.

List<string> myList = new List<string>() {
   "mammals",
   "reptiles",
   "amphibians",
   "vertebrate"
};

Now, use Remove() method to remove an element.

myList.Remove("reptiles");

Now, use RemoveAt() method to remove an element by setting the position.

myList.RemoveAt(2);

The following is the complete code −

Example

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

class Program {
   static void Main() {
      List<string> myList = new List<string>() {
         "mammals",
         "reptiles",
         "amphibians",
         "vertebrate"
      };

      Console.Write("Initial list...");
      foreach (string list in myList) {
         Console.WriteLine(list);
      }

      Console.Write("Using Remove() method...");
      myList.Remove("reptiles");

      foreach (string list in myList) {
         Console.WriteLine(list);
      }

      Console.Write("Using RemoveAt() method...");
      myList.RemoveAt(2);

      foreach (string list in myList) {
         Console.WriteLine(list);
      }
   }
}

Here is an example that implements RemoveRange() method.

Example

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

class Program {
   static void Main() {
      List<int> myList = new List<int>();
      myList.Add(5);
      myList.Add(10);
      myList.Add(15);
      myList.Add(20);
      myList.Add(25);
      myList.Add(30);
      myList.Add(35);

      Console.Write("Initial list...");
      foreach (int list in myList) {
         Console.WriteLine(list);
      }

      Console.Write("New list...");
      int rem = Math.Max(0, myList.Count - 3);
      myList.RemoveRange(0, rem);

      foreach (int list in myList) {
         Console.Write("
"+list);
      }
   }
}