custom settings class

[byteit101]

I have an application that has a custom settings type SVMProject, that has 5 string values, each with a property, nothing fancy, and I want to save to settings a stack of them. I dont want to have anything fancy for settings saving and reloading, just acess them with Settings.Default.projects.
here is a shortened form of svmproject:

[Serializable]
[SettingsSerializeAs(SettingsSerializeAs.Binary)]
public class SVMProject
{
    private string localurl;
    public SVMProject(string url)
    {
        localurl=url;
    }
    public string LocalPath
    {
        get { return localurl; }
        set { localurl = value; }
    }
}
 

and the Collection class:

public class SVMProjectCollection : System.Collections.Generic.Stack<SVMProject>
    {
 
    }

But when I hit browse in the settings designer, I don't see them