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generic classes and methods in c#

generic classes and methods in c#

Generic is a type parameter technique. Using this technique we write a class, or methods that can work any data type that means user defines data type or system define data type. It is type-safe.

using System.Collections.Generic;

Example of Generic Type

  namespace Generics
  { 
    public class GeneRicType
    {
        public T _value;
        public GeneRicType(T t)
        {
            this._value = t;

        public void Input()
        {
            Console.WriteLine(this._value);
        }

    public class Program
    {
        static void Main(string(] args)
        {
            // Integer type
            GeneRicType obj = new GeneRicTypecint>(120);
            obj.Input();

            // string type
            GeneRicTypecstring> obj1 = new GeneRicTypecstring>("Hi, -
            obj1.Input();
            Console.ReadLine();
    }
  }
}
              
 The OutPut as given below.
               
    120
    Hi, Dear!!

Example for Sum of Two Number using Generic Type

In this example, both class and methods are generic type, here we decide the output at the run-time what type we want that means Int, float etc.

namespace Generics
{
    public class CalculationClass
    {
        public T _valuel;
        public T _value2;
        public CalculationClass(T tl, T t2)
        {
            this._valuel = tl;
            this._value2 = t2;
        }
        public T InputValues objInt = new CalculationClass(Convert.ToInt32(Console.ReadLine()),
                                            Convert.ToInt32(Console.ReadLine()));
        Console.WriteLine("Sum Of Two : "+ objInt.InputValues());
        CalculationClass objDoble = new CalculationClass(Convert.ToDouble(Console.ReadLine()),
                                                Convert.ToDouble(Console.ReadLine()));
        Console.WriteLine("Sum Of Two : " + objDoble.InputValues());
        Console.ReadLine();
    }
}

The Output as given below.

10
20
Sum Of Two : 30

10.2
20.20
Sum Of Two :  30.4

Remark on Generic Type
  1. We use generic types to maximize the code reuse, increase the performance of a application and type safety. 
  2. Most common use of generics is to create collection classes just like ArrayList, Dictionary, Stack, Queue etc.




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