SQLite - using Count() to get row count - then use conditional

I'm using Xamarin for Android and the Sqlite-net Nuget for SQL and have the following Code

    protected void settingTags() {

        using (var connection = new SQLiteConnection (dbPath)) {

            var rowCount = connection.Table<User> ().Count ();

            if (rowCount <= 1) {
                var presentUser = connection.Get<User> (1);
                presentUser.Persons = persons;
                connection.Update (presentUser);
                Log.Info (Tag, "User Data Updated");
            }
            else if (rowCount > 1) {
                for (int i = rowCount; i >= 1; i--) {
                    connection.Delete(new User(){ID=i});
                }
                settingTags ();
            }
        }
    }

This gives me an empty exception Error. I used Breakpoints to pinpoint the error and somehow it is in the line:

            if (rowCount <= 1) {

And of course the other conditional. I really don't know why this would be an error as such an if-conditional is used in the documentation.

I'd really appreciate any help. And sorry if I used wrong tags or something like that for this question as this is my first. :s