[MOSS] Update lookup field value

Update Lookup Field Value Using Client Object Module

using (ClientContext mySPContext = new ClientContext("http://mossdev/"))

{

     Microsoft.SharePoint.Client.List oList = mySPContext.Web.Lists.GetByTitle("Items");



     Microsoft.SharePoint.Client.ListItem item = oList.GetItemById(1);

     item["Period"] = "1;#Q2 FY09";  //[Lookup field Id];#[Lookup field Value]

     item.Update();

     mySPContext.ExecuteQuery();

 }