Generics & Enumerable

bero_0401

Oct 3rd, 2024

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using revision;
using System.Collections;
using System.Numerics;
public class Program
{
static void Main(String[] args)
{
// var genList = new GenericList<Person>();
// genList.add(new Person(1 , "Abeer" , "012" , "Damietta" ));
var genList = new List<string>();
genList.Add("Abeer");
genList.Add("Sara");
genList.Add("Malak");
foreach (var item in genList)
{
Console.WriteLine(item);
}
Console.WriteLine(Add(3 , 2));
Console.WriteLine(Add(3.4 , 5));
// Console.WriteLine(Add(3 , "string")); xxx
}
static T Add<T>(T num1, T num2) where T : INumber<T>
{
return num1 + num2;
}
public class GenericList<T> :IEnumerable<T> where T : class /* class => means that T should be a reference type */ , new() /* with paramterless constructor*/
{
private readonly List<T> list = new List<T>();
public void remove(T item)
{
list.Remove(item);
}
public void add(T item)
{
list.Add(item);
}
public IEnumerator<T> GetEnumerator()
{
foreach (T item in list)
{
yield return item; // Yield each item in the collection
}
}
IEnumerator IEnumerable.GetEnumerator()
{
return GetEnumerator();
}
public int counter => list.Count;
}
}

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