How do I implement multiple interfaces with public properties but private set methods?

Question

I have two interfaces:

public interface IFooFile
{
    string Name { get; }
}

public interface IFooProduct
{
    string Name { get; }
}

I'm wanting to implement both with private sets:

public class AFooThing : IFooFile, IFooProduct
{
    public string IFooFile.Name { get; private set; }
    public string IFooProduct.Name { get; private set; }
}

But the access modifiers are creating the error:

The accessor of the "AFooThing.IFooFile.Name.set" must be more restrictive than the property or indexer "AFooThing.IFooFile.Name"

If I implement the class like this, I get no access modifier errors but I don't have the second interface:

public class AFooThing : IFooFile
{
    public string Name { get; private set; }
}

I can't figure out how to have both interfaces implemented with the added "private set" without causing problems. What is the proper way to handle this?

Answer 1

You cannot use access modifiers for an explicit interface, it is public . Also you could not add set property as it does not exist in the interface . What you can do is achieve your goal by using backing fields, eg

public class AFooThing : IFooFile, IFooProduct
{
    private string _fooFileName;
    private string _fooProductName;

    string IFooFile.Name => _fooFileName;
    string IFooProduct.Name => _fooProductName;

    public AFooThing()
    {
        _fooFileName = "FooFileName";
        _fooProductName = "FooProductName";
    }
}