What is the default access level for this icloneable.clone() in C#?

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here is my demo for ICloneable.Clone() implementation. I know its default access level is private. but it turns out not the case:

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

namespace CloneDemo02
{
    public class Car : ICloneable
    {
        readonly int width;

        public Car(int width)
        {
            this.width = width;
        }

        public Car Clone()
        {
            return new Car(this.width);
        }

        public override string ToString()
        {
            return string.Format("Width of car = {0}", this.width);
        }

        object ICloneable.Clone() //<===== default access level private?
        {
            return (this.Clone());
        }
    }

    class Program
    {
        static void Main(string[] args)
        {
            Console.WriteLine("testing Icloneable()");

            Car car1 = new Car(100);
            Console.WriteLine(car1.ToString());

            Car car2 = car1.Clone() as Car;
            Console.WriteLine(car2.ToString());
            Console.ReadLine();
        }
    }
}

What I have tried:

no matter what accessor I put, such as private, internal, public, all cases will raise up an error.

feel puzzled and seek clear understanding on this ICloneable.Clone().

Posted 25-Jun-22 7:50am

Southmountain

Updated 26-Jun-22 10:34am

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Comments

Richard Deeming 27-Jun-22 10:15am

The code you have posted does not produce any errors:
Clone | C# Online Compiler | .NET Fiddle[^]

Post the actual code you're struggling with, and the full details of the error(s) you're getting.

2 solutions

Solution 2

The default access level is private except for interface method implementations, then it's a bit dependent on other things, but is generally public.

Posted 26-Jun-22 10:34am

Dave Kreskowiak

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This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

ludosoep · Accepted Answer · 2022-06-26T10:29:00

You can read all about it here ICloneable Interface (System) | Microsoft Docs[^]

The ICloneable interface imo is a pretty straightforward "flat" interface with only one method allowing to return a copy of an instance of the class implementing the interface.

You are writing "

I know its default access level is private

", I don't know exactly what you man by this, but interfaces are contracts describing the members that classes and structs inheriting from the interface are required to implement. Contracts are public by definition as well as the members. Components calling the interface only have to have knowledge of the interface and not of the implementing class or struct. interface - C# Reference | Microsoft Docs[^]

In your example you have two Clone methods. But as both have no parameters (only different return types), there is no method override being done. C# allows you to keep the IClonable.Clone method, however it requires you to place the name of interface before the method name. As interfaces are public and the method is explicitely declared with the name of the interface there is no need for a access modifier as it is public by design.

HTH

Cheers

What is the default access level for this icloneable.clone() in C#?

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What is the default access level for this icloneable.clone() in C#?

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