Cannot retrieved DatabaseSize value Get-MailboxDatabase with C#, remote Powershell.

Hi all,

I have a client(runing a service) & a server (containt MailExchange server 2010).

Currently, I use remote powershell to send command from client to server via C#.

I can create a new mailbox, disable mailbox & also create distribution group.

But i can get DB size of a specify DB Name.

And this is my code :

string cmd = "Get-MailboxDatabase -Identity " + dbName;
Collection<PSObject> rs;
Pipeline pipeline = null;
            Collection<PSObject> rs = new Collection<PSObject>();
            using (runSpace = RunspaceFactory.CreateRunspace(conn))
            {
                if (runSpace.RunspaceStateInfo.State.ToString() == "BeforeOpen")
                {
                    runSpace.Open();
                    pipeline = runSpace.CreatePipeline();                                
                    pipeline.Commands.AddScript(cmd);
                 }

                rs = pipeline.Invoke();
            }
                    if (rs != null && rs.Count > 0)
                    {
			String dbSize = rs[0].Properties["DatabaseSize"].Value ;
		    }	

I can get many values in rs[0] variable .

Ex : Name, Server ... but i can't get DatabaseSize.

dbSize allway is null :(.

Please help me!

Phung Le.