cls
$tfsCollectionUrl = New-Object System.URI("http://localhost:8080/tfs/defaultcollection");
[Microsoft.TeamFoundation.Client.TfsTeamProjectCollection] $tfsCollection = Get-TfsServer $tfsCollectionUrl
$VersionControl = $tfsCollection.GetService([Microsoft.TeamFoundation.VersionControl.Client.VersionControlServer])
$DestinationFile = [IO.Path]::GetTempFileName()
$VersionControl.DownloadFileByUrl('$/MyFirstProject/WebApplication1/WebApplication1/WebForm1.aspx.cs', $DestinationFile)

Invoke-Item $DestinationFile

$tfsCollectionUrl = New-Object System.URI("[team project collection url");

$username="[user name]"
$password="[password]"
$domain="[domain]"
$cret = new-object System.Net.NetworkCredential($username, $password, $domain)
$teamProjectCollection=new-object Microsoft.TeamFoundation.Client.TfsTeamProjectCollection($tfsCollectionUrl,$cret)
$teamProjectCollection.EnsureAuthenticated()
$VersionControl = $teamProjectCollection.GetService([Microsoft.TeamFoundation.VersionControl.Client.VersionControlServer])
$workspace = $VersionControl.CreateWorkspace("BasicSccExamplePS", $VersionControl.AuthorizedUser);
$workspace.Map("[file or folder server path, for example:$/TestTeam/FolderA]", "[local path]")
$workspace.Get()