Array:
An array is a collection of similar data types that can be accessed by index. Array allocates then static memory with consecutive section of memory blocks.
ArrayList:
ArrayList is a collection of objects of same or different types. ArrayList size can be dynamically increased or decreased as per the requirement.
Here is difference table of Array vs ArrayList
| Array | ArrayList |
| Array stores a fixed number of elements. | ArrayList is dynamic in term of size. If the number of elements exceeds, ArrayList size will increase or decreased as per requirement. |
| It contains both primitive data types and objects of a class. | ArrayList does not contain the primitive data types but contains object entries. |
| Array does not have Generics feature. | ArayList has Generics feature. |
| Array belongs to namespace System | ArrayList belongs to namespace System.Collection |
| Array cannot accept null. | ArrayList can accept null. |