Custom type and settings: the designer will not write the value of the app.config parameter

Here is what I want to do:

• Sets the application settings parameter, the value of which is an array of custom type
• Have an array of custom type serialized in XML, as opposed to a string
• Get the serialized value of my parameter stored in app.config.

So far it eludes me

I have my own type:

[TypeConverter(typeof(ServiceConfigurationConverter))]
[Serializable]
public class ServiceConfiguration
{
    public string Name { get; set; }
    public string Url { get; set; }
    // more
}

It has a custom TypeConverter that converts it back and forth from a string. I wrote it this way because the examples I found were intended to be converted to strings and because I would like to serialize a string if it meant that my values ​​were stored in app.config. But, as we shall see, this is not so.

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