Sample code to connect Dynamics CE using OAuth and Deactivate the record.
  Install the Microsoft.Xrm.Tooling.Connector assembly.   public  static  IOrganizationService GetCrmService1()           {               var  connection = new  CrmServiceClient(                   "Url=https://pane-crm-tafp-dev.crm4.dynamics.com;"  +                   "Username=[username]@[domain].com;"  +                   "Password=password;"  +                   "AuthType=OAuth;"  +                   "AppId=51f81489-12ee-4a9e-aaae-a2591f45987d;"  + /// User App Id            ...