Powershell webclient.UploadFile

$Source = @"
  using System.Net;
  public class ExtendedWebClient : WebClient
  {
    public int Timeout;
    protected override WebRequest GetWebRequest(System.Uri address)
    {
      WebRequest request = base.GetWebRequest(address);
      if (request != null)
      {
        request.Timeout = Timeout;
        var httpRequest = request as HttpWebRequest;
      }
      return request;
    }
    public ExtendedWebClient()
    {
      Timeout = 100000; // the standard HTTP Request Timeout default
    }
  }
"@;

$debugPreference = "Continue"
#Write-Output "Output msg"
#Write-Debug "Debug msg"
Add-Type -TypeDefinition $Source -Language CSharp

$webclient = New-Object ExtendedWebClient;
$webclient.Timeout=10000000;
$fileName = "0.iso";
$sourceFilePath = "C:\\$fileName";
$siteAddress = "http://nexus.lab.local:8081/nexus/content/sites/myproj/$fileName";
#$webclient.Headers.Add("Content-Length", "$sourceFilePath.Length")
$webclient.Headers.Add("Content-Type", "application/zip")
$webclient.Credentials = New-Object System.Net.NetworkCredential("admin", "admin123");
$webclient.AllowWriteStreamBuffering = $false;
$webclient.UploadFile($siteAddress, "Post", $sourceFilePath);