public int GetPropertyQualifierSet_(string wszProperty, out IWbemQualifierSetFreeThreaded ppQualSet)
        {
            IntPtr ptr;

            if (this.pWbemClassObject == IntPtr.Zero)
            {
                throw new ObjectDisposedException(name);
            }
            int num = WmiNetUtilsHelper.GetPropertyQualifierSet_f(11, this.pWbemClassObject, wszProperty, out ptr);

            if (num < 0)
            {
                ppQualSet = null;
            }
            else
            {
                ppQualSet = new IWbemQualifierSetFreeThreaded(ptr);
            }
            GC.KeepAlive(this);
            return(num);
        }