Powershell and SaveBinaryDirect

Hi,

I'm trying to convert this statement in vb.net into Powershell syntax.

vb.net

SP.File.SaveBinaryDirect(_ctx, "/test.pdf", fs, True)

Powershell

[Microsoft.SharePoint.Client.File]::SaveBinaryDirect($SPContext, "/test.pdf", [System.IO.Stream]$FileStream, $true)

After executing, I got the error as follows:

 Unable to find type [Microsoft.Sharepoint.Client.File]: make sure that the assembly containing this type is loaded.

I'm using Powershell 2.0 and SharePoint 2010.

Please advise.

Thanks,

Brew