DoorsAddRange

DoorsAddRange is a method in the .NET Framework, specifically part of the System.Collections.Generic.List class. It is used to add a range of elements to a list. This method is particularly useful when you need to add multiple items to a list at once, rather than using a loop to add each item individually.

The syntax for using DoorsAddRange is as follows:

list.AddRange(collection)

Here, list is the instance of the List class to which you want to add elements, and collection is the collection of elements that you want to add. The collection can be an array, another list, or any other collection that implements the IEnumerable interface.

For example, consider a list of integers:

List<int> numbers = new List<int> { 1, 2, 3 };

You can add a range of integers to this list using DoorsAddRange:

numbers.AddRange(new int[] { 4, 5, 6 });

After this operation, the numbers list will contain the elements { 1, 2, 3, 4, 5, 6 }.

DoorsAddRange is an efficient way to add multiple elements to a list, as it minimizes the number of times the list's internal array needs to be resized. This can lead to better performance, especially when adding a large number of elements. However, it is important to note that DoorsAddRange does not check for duplicates, so if the collection you are adding contains duplicates, they will be added to the list as well.

In summary, DoorsAddRange is a convenient and efficient method for adding a range of elements to a list in the .NET Framework. It simplifies the process of adding multiple items and can improve performance when adding large numbers of elements.