// Important: WinHttp API calls should not happen while another WinHttp call for the same handle did not
// return. During finalization that was not initiated by the Dispose pattern we don't expect any other WinHttp
// calls in progress.
protected override bool ReleaseHandle()
{
if (_parentHandle != null)
{
_parentHandle.DangerousRelease();
_parentHandle = null;
}
return(WinHttpCloseHandle(handle));
}