AvCapWPF.FilterInfo.GetName C# (CSharp) Метод

        private string GetName(IMoniker moniker)
        {
            Object bagObj = null;
            IPropertyBag bag = null;

            try
            {
                Guid bagId = typeof(IPropertyBag).GUID;
                moniker.BindToStorage(null, null, ref bagId, out bagObj);
                bag = (IPropertyBag)bagObj;

                object val = "";
                int hr = bag.Read("FriendlyName", ref val, IntPtr.Zero);
                if (hr != 0)
                    Marshal.ThrowExceptionForHR(hr);

                string ret = (string)val;
                if ((ret == null) || (ret.Length < 1))
                    throw new ApplicationException();

                return ret;
            }
            catch (Exception)
            {
                return "";
            }
            finally
            {
                bag = null;
                if (bagObj != null)
                {
                    Marshal.ReleaseComObject(bagObj);
                    bagObj = null;
                }
            }
        }