.Net classes with no CREATE function

Hi!

I'm trying to copy files from my werbservice server to another thru my webservice.

I found this example

c# - Copy file to remote computer using remote admin credentials - Stack Overflow

and I was translating this to PB .Net, when I found that:

System.IntPtr lintptr_duptoken

Security.Principal.WindowsIdentity luo_winIdGral

.

.

.

luo_winIdGral = createSystem.Security.Principal.WindowsIdentity(lintptr_duptoken)

can't compile, I'm getting an error that says THERE'S NO SUITABLE CONSTRUCTOR FOR CREATE STATEMENT: WINDOWSIDENTITY

And I believe that's because there's no CREATE function on that class, as for example on XMLReader.

Why is this? and how can I workaround it?