Get Last Modified Date without downloading the file in PowerShell

Compatibility: v5.x

$zipfile = "https://www..../xyz/test.zip"

add-type @"
    using System.Net;
    using System.Security.Cryptography.X509Certificates;
    public class TrustAllCertsPolicy : ICertificatePolicy {
        public bool CheckValidationResult(
            ServicePoint srvPoint, X509Certificate certificate,
            WebRequest request, int certificateProblem) {
            return true;
        }
    }
"@

$AllProtocols = [System.Net.SecurityProtocolType]'Ssl3,Tls,Tls11,Tls12'
[System.Net.ServicePointManager]::SecurityProtocol = $AllProtocols
[System.Net.ServicePointManager]::CertificatePolicy = New-Object TrustAllCertsPolicy

#$res = Invoke-WebRequest -Uri $zipfile

$webRequest = [System.Net.HttpWebRequest]::Create($zipfile)
$webRequest.Method = "GET"
[System.Net.HttpWebResponse]$webResponse = $webRequest.GetResponse()


Write-Output $webResponse.LastModified