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Generic Class in C#

Generic classes in C# was introduced in C# 2.0. A generic class is introduced for type safety. Using generics, C# class may work as a placeholder for any data type. Angle brackets are used to define generic class in C#. Good understanding of generics is necessary to understand various designing patterns.

Here we can see a very simple example of generic.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace CSharp_Test
    class Program
        static void Main(string[] args)
            myclass obj = new myclass { id = 1, name = "yogesh" };
            List<myclass> obj1 = new List<myclass>
                new myclass{ id=1, name="yogesh" },
                new myclass{ id=2, name="yogesh1" },
                new myclass{ id=3, name="yogesh2" }
            genclass<int> obj5 = new genclass<int>(20);
            Console.WriteLine("Generic Variable is "+obj5.genvariable);
            genclass<string> obj6 = new genclass<string>("ceg123");
            Console.WriteLine("Generic Variable is with string " + obj6.genvariable);
            genclass<myclass> classobj = new genclass<myclass>(new myclass { id=12, name = "Vikas Sharma" });
            Console.WriteLine("Generic Variable of class is with string " + classobj.genvariable.id+" "+classobj.genvariable.name);
            foreach (var obj2 in obj1)
    class myclass
        public string name;
        public int id;
    public class genclass<T>
        public T genvariable;
        public genclass(T value)
            this.genvariable = value;
        public T generimethod()
            return this.genvariable;

Generics classes are used for code reusability. T is used as a placeholder. It improves the performance of the program due to the unavailability of boxing and unboxing.