[WebMethod(true)]

public void LogOut(string userId)

{

EFServiceClient client =
EFClientTools.ClientUtility.Client;

var ipAddress =
HttpContext.Current.Request.UserHostAddress;

var clientInfo = new ClientInfo()

{

UserID = userId,

IPAddress = ipAddress,

Locale = "en-us",

UseDataSet = true

};

client.LogOff(clientInfo);

}