How to use OAuth2 authentication APIs

I just checked and both of the following append the slash to the redirect URL:

                    Uri redirect = new Uri("https://localhost");
                    var authUri = DropboxOAuth2Helper.GetAuthorizeUri(OAuthResponseType.Token, appKey, redirect, state, false, false);

                    var authUri = DropboxOAuth2Helper.GetAuthorizeUri(OAuthResponseType.Token, appKey, "https://localhost", state, false, false);

Perhaps your registration page should suggest adding the trailing slash to avoid others running into this.

Regarding "or"able enums, lets take SearchMode as an example. The current implementation is neither intuitive or scalable. If you want to extend the API in the future with a new field that you can search on, you have to add every permutation of the flags as a definition - SearchMode.Description, SearchMode.FilenameAndDescription, SearchMode.FilenameAndContentAndDescription. These would normally be defined in C# as a Flags enum:

    [Flags]
    public enum SearchMode
    {
        Filename = 1,
        Content = 2,
        Description = 4,
        AnythingElse = 8
    }
           SearchMode mode = SearchMode.Filename | SearchMode.Content;
            if (searchDescription)
                mode |= SearchMode.Description;

A lot of discussion here: http://stackoverflow.com/questions/8447/what-does-the-flags-enum-attribute-mean-in-c

By the way, you can download my app here if you'd like to try it: http://www.modernfileexplorer.com

Cheers,

Paul