Many times, we being the developers come across a scenario where we need to Add or Remove a range of Items in a list.

In c# we have a function called AddRange to add a range of same data type elements in to a list that also has the same data type.

Here is the code for the same

class Program
    {
        static void Main(string[] args)
        {
            string[] colors = { "Black", "White", "Blue", "Green", "Orange" };
            List<string> colorList = colors.ToList();

            Console.WriteLine("All colors");
            foreach (string color in colorList)
            {
                Console.WriteLine(color);
            }

            Console.WriteLine("\nAdd range of colors to the existing color List");
            colorList.AddRange(colorList);//Add Range takes list of same data type
            foreach (string color in colorList)
            {
                Console.WriteLine(color);
            }

            Console.WriteLine("\nRemove color number 2 to 4 from color List");
            colorList.RemoveRange(1,3);//First parameter "1" is for setting the index from where the removal shall start, Second parameter"3" is the count of elements to be removed.
            foreach (string color in colorList)
            {
                Console.WriteLine(color);
            }

            Console.Read();

        }
    }

Signature of AddRange function is as below.

public void AddRange(IEnumerable<T> collection);

Signature of RemoveRange function is as below

public void RemoveRange(int index, int count);

Output of the Program will look like this

All Colors
Black
White
Blue
Green
Orange

Add range of colors to the existing color List
Black
White
Blue
Green
Orange
Black
White
Blue
Green
Orange

Remove color number 2 to 4 from List
Black
Orange
Black
White
Blue
Green
Orange