How does the $null overload work?

Question

PowerShell

It's happening in PowerShell
I can understand why
([system.Net.Dns]::GetHostByName()) doesn't work.AddressList
No overload, ok.
But why does it work, also with the result (gives the local ip)
([system.Net.Dns]::GetHostByName($null)).AddressList

Answer 1

https://msdn.microsoft.com/en-us/library/system.ne... (v=vs.110).aspx
If you pass an empty string as the host name, this method retrieves the standard host name for the local computer.