/// <summary>
/// The <c>GetHostName</c> method queries a DNS server to resolve the hostname of the <paramref name="address"/> via reverse lookup.
/// </summary>
/// <param name="query">The <see cref="IDnsQuery"/> instance.</param>
/// <param name="address">The <see cref="IPAddress"/> to resolve.</param>
/// <returns>
/// The hostname if the reverse lookup was successful or <c>null</c>, in case the host was not found.
/// If <see cref="ILookupClient.ThrowDnsErrors"/> is set to <c>true</c>, this method will throw an <see cref="DnsResponseException"/> instead of returning <c>null</c>!
/// </returns>
/// <exception cref="ArgumentNullException">If <paramref name="address"/>is null.</exception>
/// <exception cref="DnsResponseException">If no host has been found and <see cref="ILookupClient.ThrowDnsErrors"/> is <c>true</c>.</exception>
public static string GetHostName(this IDnsQuery query, IPAddress address)
{
if (query == null)
{
throw new ArgumentNullException(nameof(query));
}
if (address == null)
{
throw new ArgumentNullException(nameof(address));
}
var result = query.QueryReverse(address);
return(GetHostNameAsyncProcessResult(result));
}
