PowerShell-Get-WebPage

Function Get-WebPage
{
[CMDLetBinding()]
Param
(
  [Parameter(mandatory=$true)] [String] $URL,
  [System.Net.ICredentials] $Credentials,
  [System.Net.IWebProxy] $WebProxy,
  [System.Net.WebHeaderCollection] $Headers,
  [String] $UserAgent
)
 
$webclient = New-Object Net.WebClient

    if ($Credentials)
    {
            $webclient.credentials = $Credentials
    }
    if ($WebProxy)
    {
            $webclient.proxy = $WebProxy
    }
    if ($Headers)
    {
            $webclient.headers.add($Headers)
    }
    if ($UserAgent)
    {
            $webclient.headers["User-Agent"] = $UserAgent
    }
 
    $webclient.Encoding = [System.Text.Encoding]::UTF8
 
    $result = $null

    try
    {
            $result = $webclient.downloadstring($URL)
    }
    catch
    {
            throw $_
    }
 
    return $result
 
}