RaumfeldNET.UPNPMediaList.getListPositionOfObjectId C# (CSharp) Method

        public int getListPositionOfObjectId(String _objectId)
        {
            if (String.IsNullOrEmpty(_objectId))
                return -1;
            var found = this.list.Find(item => item.objectId == _objectId);
            if (found != null)
            {
                return found.listIndex;
            }
            return -1;
        }