- Data Structure
- Networking
- RDBMS
- Operating System
- Java
- MS Excel
- iOS
- HTML
- CSS
- Android
- Python
- C Programming
- C++
- C#
- MongoDB
- MySQL
- Javascript
- PHP
- Physics
- Chemistry
- Biology
- Mathematics
- English
- Economics
- Psychology
- Social Studies
- Fashion Studies
- Legal Studies
- Selected Reading
- UPSC IAS Exams Notes
- Developer's Best Practices
- Questions and Answers
- Effective Resume Writing
- HR Interview Questions
- Computer Glossary
- Who is Who
Generics vs non-generics in C#
There are two types of collections in C#: non-generic collections and generic collections.
Generics in C#
Generic collections hold elements of same datatypes.
For example −
- List
- Dictionary
- Hashset
Dictionary − Dictionary is a collection of keys and values in C#. Dictionary <TKey, TValue> is included in the System.Collection.Generics namespace.
Hashset − HashSet in C# eliminates duplicate strings or elements in an array.In C#, it is an optimized set collection.
Non-Generics in C#
Non-generic collections hold elements of different datatypes.
The following are the non-generic collections: ArrayList, BitArray.
ArrayList − It represents ordered collection of an object that can be indexed individually. ArrayList is an alternative to an array. However, unlike array you can add and remove items from a list at a specified position using an index and the array resizes itself automatically.
BitArray − It represents an array of the binary representation using the values 1 and 0. It is used when you need to store the bits but do not know the number of bits in advance.