How do I properly use ForEach() statement of List?

Question

I'm confused what I'm doing wrong in ForEach method syntax of List?

PS D:\ntt> $nicInfo.IpConfigurations.Count
2
PS D:\ntt> $nicInfo.IpConfigurations[0]

PrivateIpAddressVersion Name      Primary PrivateIpAddress PrivateIpAllocationMethod Subnet Name PublicIpAddress Name ProvisioningState
----------------------- ----      ------- ---------------- ------------------------- ----------- -------------------- -----------------
IPv4                    ipconfig1 True    10.233.0.4       Dynamic                                                    Succeeded


PS D:\ntt> $nicInfo.IpConfigurations.GetType()

IsPublic IsSerial Name                                     BaseType
-------- -------- ----                                     --------
True     True     List`1                                   System.Object


PS D:\ntt> $nicInfo.IpConfigurations.ForEach({$_})
PS D:\ntt>

Answer 1

Are you trying to do something with each item in the collection? Do you want to do something like this:

$nicInfo.IpConfigurations | ForEach-Object {
  $ipConfiguration = $_
  write-Output $ipConfiguration
  # do more stuff with this $ipConfiguration
}

Answer 2

Just for your reference, you can use this code for list.ForEach().

$nicInfo.IpConfigurations.ForEach({write-host $args[0].ToString()})

And I test it myself, it works. Sample code as below:

$s=New-Object System.Collections.Generic.List[string]
$s.Add("hello_1")
$s.Add("hello_2")
$s.Add("hello_3")
$s.ForEach({write-host $args[0].ToString()})

Test result as below:

As well as I found this similar issue, @PetSerAl explained very well there.