Gets a remote TLS certificate in Powershell 6/7

Get TLS certificate.ps1

function Get-RemoteCertificate {
  [CmdletBinding()]
  [OutputType([System.Security.Cryptography.X509Certificates.X509Certificate])]
  param (
    [Parameter(
      Mandatory,
      ValueFromPipeline
    )]
    [ValidateNotNull()]
    [Uri]
    $Uri
  )
  process {
    try {
      $TcpClient = [System.Net.Sockets.TcpClient]::new($Uri.Host, $Uri.Port)
      try {
        $SslStream = [System.Net.Security.SslStream]::new($TcpClient.GetStream())
        $SslStream.AuthenticateAsClient($Uri.Host)
        $SslStream.RemoteCertificate
      } finally {
        $SslStream.Dispose()
      }
    } finally {
      $TcpClient.Dispose()
    }
  }
}