ArrayList

Description

ArrayList collection contains a group of elements of any type.

ArrayList referenceVariable = new ArrayList();

Full Path: System.Collections.ArrayList
The ArrayList class is not a generic class; so you need not specify data type value while creating an object.
Exactly like List, except in the ArrayList we can store any type of data at the same time
It is dynamically sized. You can add or remove elements at any time.
It is index-based. You need to access elements by using the zero-based index.
It is not sorted by default. The elements are stored in the same order in which they are initialized.
You don't specify the data type of elements for ArrayList. So you can store any type of elements in ArrayList.
Each element is treated as System.Object type while adding, searching, and retrieving elements.

Feature	Description
`Count`	Retrieves the total number of elements.
`Capacity`	Gets or sets the total number of elements the internal data structure can hold.
`Add(object)`	Adds an object to the list.
`AddRange(ICollection)`	Adds all the elements in the specified collection to the list.
`Insert(int, object)`	Inserts an object at the specified index.
`InsertRange(int, ICollection)`	Inserts a collection of elements at the specified index.
`Remove(object)`	Removes the first occurrence of a specific object in the list.
`RemoveAt(int)`	Removes the object at the specified index.
`RemoveRange(int, int)`	Removes a range of elements starting at a specified index.
`Clear()`	Removes all elements from the list.
`IndexOf(object)`	Returns the zero-based index of the first occurrence of an object.
`BinarySearch(object)`	Searches the list using binary search.
`Contains(object)`	Checks whether a specific object exists in the list or not.
`Sort()`	Sorts the elements of the list.
`Reverse()`	Reverses the order of the elements in the list.
`ToArray()`	Copies the elements of the list to a new array.

Info

All the shared features can be used for ArrayList