Generics is one of the features of C#, It allows us to define type-safe classes, methods, interfaces,
delegates, and events. It helps in improving the code reusability and performance.
This helps in having a single method which can take different data types as int or double or string or bool,
etc... instead of having multiple overloading methods for a specific scenario.
Syntax:
//Generic Class
Class MySample
{
}
//Creating an instance to class by specifying the type at T.
MySample obj = new MySample();
//Generic Array
T[] array = new T[20]
Example:
using System;
namespace SampleProgram {
class MySample {
public static void Main(string[] args) {
//Create instance to class with int type so it takes int param.
MyPrintClass <
int >
objInt = new MyPrintClass <
int >
();
objInt.Input = 145;
objInt.PrintHere(238);
//Create instance to same class with string type
MyPrintClass <
string >
objString = new MyPrintClass <
string >
();
objString.Input = "
Input ";
objString.PrintHere(" Hello");
}
}
class MyPrintClass <
T >{
public T Input {
get;
set;
}
public void PrintHere(T data) {
Console.WriteLine( " Input is: " + Input);
Console.WriteLine( " Prints the Type and Value Here: ");
switch (Type.GetTypeCode(data.GetType())) {
case TypeCode.Int32:
case TypeCode.Int64:
Console.WriteLine(" Integer Type, Value is " + data);
break;
case TypeCode.Double:
Console.WriteLine( " Integer Type, Value is " + data);
break;
case TypeCode.String:
Console.WriteLine( " String Type, Value is " + data);
break;
default:
Console.WriteLine( "
default, this type not exists ");
break;
}
}
}
}
The output will be:
Input is: 145
Prints the Type and Value Here:
Integer Type, Value is 238
Input is: Input
Prints the Type and Value Here:
String Type, Value is Hello
