Make classes accessible only by static object

Question

I'm creating a library in .Net

I have a static class called DataManager.

public static class NewDataManager
{
    public static Soccer Soccer { get; private set; }

    static NewDataManager()
    {
         Soccer =  new Classes.Soccer.Soccer();
    }
}

Soccer class is like:

public class Soccer
{
    public static Mapping.Mapping Mappings { get; private set; }

    public Soccer()
    {
        Mappings = new Mapping.Mapping();
    }
}

And Mapping class is just an another public empty class.

When i use this project as a reference in another project, i can access my objects like

NewDataManager.Soccer.Mappings

That's fine, this is what i want. The problem is, i can initialize all classes in referencing project like

var s = new Soccer();
var m = new Mapping();

I want those classes accessible only via my NewDataManager class, projects using my library should not be able to initialize classes.

How can i restrict that?

Answer 1

To prevent another assembly from instantiating a class, make its constructor internal:

public class Soccer
{
    public static Mapping.Mapping Mappings { get; private set; }

    internal Soccer()  //  <-- instead of 'public'
    {
        Mappings = new Mapping.Mapping();
    }
}

public class Mapping
{
    internal Mapping()
    {
    }
}

(By the way, it looks like you have namespaces named Soccer and Mapping. Don't do this.)