C permits classes, structs, interfaces and methods to be parameterized by the types of data they store and manipulate, through a set of features known collectively as generics. Generics are useful because many common classes and structs can be parameterized by the types of data being stored and manipulated - these are called generic classes and generic structs. Similarly, many interfaces define contracts that can be parameterized by the types of data transacted - these are called generic interfaces. Classic examples of generic classes are collection classes such as Hash Tables, Maps and Lists.
C# - Generics
Java Generics - Methods - Tutorialspoint
Generic is a class which allows the user to define classes and methods with the placeholder. Generics were added to version 2. The basic idea behind using Generic is to allow type Integer, String, … etc and user-defined types to be a parameter to methods, classes, and interfaces. A primary limitation of collections is the absence of effective type checking. This means that you can put any object in a collection because all classes in the C programming language extend from the object base class.
C# Generic Methods
Join Stack Overflow to learn, share knowledge, and build your career. Connect and share knowledge within a single location that is structured and easy to search. I have an incr function to increment the value by 1 I want to make it generic,because I don't want to make different functions for the same functionality. Suppose I want to increment int , float , char by 1.
When we create a method, class or interface, we usually specify the type of the parameter and its return type. That is because showValue function expects an integer and not a string;. To solve the problem what we do is write another overloaded function showValue which takes the string as input as shown below. Show val. ToString in both the functions.