To create a List in C#, you can use the List<T> class, where T is the type of item you want to store in the list. Here's an example of how to create a List of integers:

List<int> numbers = new List<int>();

This creates an empty List of integers named numbers.

To add items to the list, you can use the Add method:

numbers.Add(1);
numbers.Add(2);
numbers.Add(3);

This adds the integers 1, 2, and 3 to the numbers List.

You can also create a List and add items to it in a single statement using collection initializer syntax:

List<string> names = new List<string> { "Alice", "Bob", "Charlie" };

This creates a List of strings named names and initializes it with the values "Alice", "Bob", and "Charlie".

To access items in the List, you can use the index operator ([]):

int firstNumber = numbers[0];
string firstName = names[0];

This retrieves the first item in the numbers List (which is 1) and the names List (which is "Alice").

You can also use a foreach loop to iterate over all the items in the List:

foreach (int number in numbers)
{
    Console.WriteLine(number);
}

This prints the numbers 1, 2, and 3 to the console.

These are some basic examples of how to create and use a List in C#

You can also create a list of objects. Here is a detailed article on How To Create A List Of Objects In C#?

Next reading: C# List Tutorial - Everything You Need To Learn About List In C# (c-sharpcorner.com)