Using multidimensional arrays as elements in an ArrayList collection is not supported.ДЄlways use arrays or ListвЂ™s when possible, when working with valuetypes. The ArrayList collection accepts null as a valid value, allows duplicate elements. Indexes in this collection are zero-based. The capacity can be decreased by calling TrimToSize or by setting the Capacity property explicitly.Д®lements in this collection can be accessed using an integer index. As elements are added to a ArrayList, the capacity is automatically increased as required through reallocation. The capacity of a ArrayList is the number of elements the ArrayList can hold. You must sort the ArrayList prior to performing operations (such as BinarySearch) that require the ArrayList to be sorted. The ArrayList is not guaranteed to be sorted. If itвЂ™s multidimensional, you can always use a List>ДЄrray List is untyped list, it doesnвЂ™t know what is in there (and indeed,you could add any combination of objects). If youвЂ™re going to be adding/removing elements a lot, just use a List. It implements the IList generic interface using an array whose size is dynamically increased as required. The List class is the generic equivalent of the ArrayList class. Provides methods to search, sort, and manipulate lists. Represents a strongly typed list of objects that can be accessed by index. However, if you have a fixed length array, they are an easy way of retrieving elements by index. You should not use arrays when you donвЂ™t know the size of the array, or the size is likely to change. When you Preper array вЂ“ You know the size of an array at the time that it is created.

A jagged array is sometimes called an вЂњarray of arrays.вЂќ The elements of a jagged array can be of different dimensions and sizes. A jagged array is an array whose elements are arrays.Each item is accessed in the array variable through the use of an index value into the array.ДЄ C# array may be created in a number of different ways. An array allows a collection of values of the same type to be stored and accessed via a single variable.

List vs array vs arraylist