11. Generic

In C#, generics provide a way to create classes, structures, interfaces, and methods with placeholders for the data types they operate on. Generics allow you to design flexible and reusable components while maintaining type safety. Generics constraints further enhance the capabilities of generics by specifying limitations on the types that can be used with a generic type or method.

public class Box<T>
{
    private T value;
 
    public Box(T value)
    {
        this.value = value;
    }
 
    public T GetValue()
    {
        return value;
    }
}