9. Generic

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using System; using System.Collections.Generic; using System.Linq; class MainClass { static void Main() { Console.WriteLine("Hello World!"); GenericClass<string> gc1 = new GenericClass<string>(); gc1.AddData("Hello"); Console.WriteLine(gc1.GetData()); var pagedData = new Page<User>(new List<User>()); GenericMethodExample example = new GenericMethodExample(); example.Display<int>(100); // Outputs: 100 example.Display<string>("C#"); // Outputs: C# // Usage IGenericRepository<string> repo = new GenericRepository<string>(); repo.Add("Item1"); Console.WriteLine(repo.GetById(0)); // Outputs: Item1 } } public class User {} public class Page<T>{ public IEnumerable<T> Data {get; set;} public Page(IEnumerable<T> data){ Data = data; } } public class GenericClass<T>{ private T _data; public T GetData(){ return _data; } public void AddData(T data){ _data = data; } } public class GenericMethodExample { public void Display<T>(T data) { Console.WriteLine(data); } }
using System.Collections.Generic; public interface IGenericRepository<T> { void Add(T item); T GetById(int id); } public class GenericRepository<T> : IGenericRepository<T> { private List<T> _items = new List<T>(); public void Add(T item) { _items.Add(item); } public T GetById(int id) { return _items[id]; } }
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