A simple question. How do I test if my current DNS is working or down? Would it involve polling? That I fear would take up resources and also require execution on a separate thread.
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A simple question. How do I test if my current DNS is working or down? Would it involve polling? That I fear would take up resources and also require execution on a separate thread.
Yes it would involve looking up something, resolving a host name or some other DNS function. In addition you’d need to ensure that the host you’re trying to resolve has not been cached in the local DNS cache too.
The Dns.GetHostByName function performs a lookup, but that doesn’t mention if it will use the local cache. It’s likely that it does, as it probably uses the OS lookup functionality under the hood.