What is the difference between array and List?

C# Array vs List is wherever the abstraction and implementation of people in computing meet. An array is incredibly lot of tied to the hardware notion of continuous, contiguous memory, with every part identical in size (although typically these parts are addresses, and so talk over with non-identically-sized referents). A list could be an idea (from arithmetic to an extent) wherever parts are ordered and wherever there’s (normally) a starting and finish, and thus wherever indexing is feasible. These 2 ideas line up quite well. However, once we contemplate a list as an abstract data sort, an approach to accessing and manipulating data, we are able to break a number of those rules.

What is an Array?

An array could be a sequent assortment of comparable data, which will be accessed as per the “index”. It’s the best style of a system during which the weather get to keep in a contiguous memory location.

In Array, the index starts at zero, thus to access the primary part of An array “numarray”, it ought to be written as numarray[0].

An array could be a consecutive section of memory that occupies n*size(type) bytes, wherever n is that the length of the array and size(type) is that the size in memory needed to store the info sort you’re progressing to use within the array. This suggests that if you would like to form an array of one hundred ints, and every int occupies four bytes, you may have to be compelled to have an unused memory section of a minimum of four hundred bytes (100*4). This also implies that the array is pretty cheap to form, unleash, and use due to their chunks of memory.

Array Options:-

  • The info is kept in a type of continuous memory allocations. every half follows different simply once it within the m/y. there’s no randomness in allocation.
  • They give random access like arr[0],arr[6] etc.
  • There is a static allocation of memory. n this might result in wastage of memory.
  • There is only 1 style of data in every cell of an array.
  • Insertion and deletion are a bit longer intense.

What is a List?

The ArrayList could be an assortment of objects of the same or differing types. The dimensions of An ArrayList is dynamically inflated or slashed as per necessity. It works like an array; however, in contrast to an array in ArrayList, things are dynamically allotted or deallocated, i.e. you’ll add, remove, index, or hunt for data in a very assortment.

A list but could be an utterly completely different structure. Most list implementations are a mix of nodes that store: one. – One price and, 2. – One or a lot of pointers that keep the nodes connected between them. This suggests that you just do not want an enormous chunk of obtainable memory with a size large enough to carry all of your data because the nodes are scattered through your memory. 

List options:-

  • The info is kept at random in components. n every half is connected to different via a pointer to next cell (n to the previous cell just in case of double link list)
  • They are to be accessed consecutive thanks to the dependency of every half.
  • It is dynamically allotted that’s m/y is allotted to every cell once process request for it. Thus there’s no m/y wastage.
  • A single cell is divided into several components, every having information of various data sort. However, the last essentially has to be the pointer to an ensuing cell.
  • Insertion and deletion are a ton a lot of easier and quicker. Looking out, too, is easier.

Head To Head Comparison Between C# Array and List

Below is the top 5 difference between C# Array vs List

C# Array Vs List Infographics

Key Difference Between C# Array and List

Let’s look at the top Comparison between C# Array and List below –

  1. Array stores data of the same sort, whereas ArrayList stores data within the type of the object, which can be of various sorts.
  2. The size of An ArrayList grows dynamically, whereas Array size remains static throughout the program.
  3. Insertion and deletion operation in ArrayList is slower than an Array.
  4. Arrays are powerfully typewritten, whereas ArrayLists aren’t powerfully typewritten.
  5. Arrays belong to System. Array namespace whereas ArrayList belongs to System. Collections namespace.
  6. Once selecting between Array and ArrayList, opt for the idea of their options that you just need to implement.

 C# Array vs List Comparison Table

Below is the topmost comparison

1Arrays are continuous in memory that makes it exhausting (in a performance sense) to insert parts within the middle of the list. The advantage is that the ability to perform random access.Lists, on the opposite hand, are parts that unfold concerning in memory, link along. This enables straightforward insertion within the list; however, random access while not further data structures isn’t doable.
2An array could be a system; that’s to mention, it’s a particular approach to organizing data within the memory device.A list is an abstract data type; that is to say, it is any data structure that supports a specific bunch of operations.
3An array is a collection of homogeneous parts.A list is a collection of heterogeneous elements.
4Array memory allocated is static and continuous.List memory allocated is dynamic and Random.
5A user needn’t ought to confine track of the next memory allocation.A user must confine Track of the next location wherever memory is allotted.


We saw a comparison of C# Array vs List performance memory usage within the C# language. For speed, it’s typically worthy to like regular arrays. The performance profit is critical.

Lists are used much more usually in C# than arrays are; however, there are some instances wherever arrays will (or should) be used, together with if your data is unlikely to grow significantly or if you’re coping with a comparatively great deal of data which will have to be compelled to be indexed into usually.

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