Arguing with my compiler (constructor failure)

File1:

Code:

---

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Fie;
namespace TwoArgConstructor
{
    class Program
    {
        Foo myfoo;
        static void Main(string[] args)
        {
        }
        public void Initialize()
        {
            myfoo = new Foo(1, 2);
        }
    }
}

---

File2:

Code:

---

namespace Fie
{
    class Foo
    {
        Foo(int a, int b) { }

    }
}

---

Error: Fie.Foo does not contain a constructor that takes two arguments

Yes it does! Can anyone see what is wrong here?

Quzah.

The answer is that it was a visibility issue. I didn't know constructors had to be plublic. That doesn't really make sense, but that's what it was.

File2:

Code:

---

namespace Fie
{
    class Foo
    {
        public Foo(int a, int b) { }

    }
}

---

The MSND link to the error: Compiler Error CS1729 - didn't actually explain the issue, but I saw their use of the keyword public which I added and found that it did indeed fix the issue.


Quzah.

For ideas around the concept of a private constructor, see here.

Meanwhile, if you have a chance grab a hold of Pro C# 2010 and the .Net Platform. I noticed the other day when you said that you hadn't reached the ref keyword yet. Argument passing is really at the core of the language, and should come very early. So I suspected that whatever you were basing your studies one wasn't probably the best for you. That book, on the other hand, has everything you will ever want to know about C# and taught in the proper order. It's possibly the most complete book on the language.

I have had that sitting in my cart, I just haven't gotten around to buying it. I've been half-heartedly fiddling around with C# here and there, but I really should just go ahead and get what's in my cart. I've been putting it off for no particular reason.


Quzah.

Quote:

---

Originally Posted by Mario F.

For ideas around the concept of a private constructor, see here.

Meanwhile, if you have a chance grab a hold of Pro C# 2010 and the .Net Platform. I noticed the other day when you said that you hadn't reached the ref keyword yet. Argument passing is really at the core of the language, and should come very early. So I suspected that whatever you were basing your studies one wasn't probably the best for you. That book, on the other hand, has everything you will ever want to know about C# and taught in the proper order. It's possibly the most complete book on the language.

---

I have the 2008 version of that book, in hardcover form, and I agree. it is the most complete reference I've seen, short of the MSDN library, and in most cases, it has much better examples than MSDN.