c# - NullReferenceException Include LINQ expression MVC3 -

following code in details.cshtml page:

 @{             @html.raw(" | ");             (int = 0; < model.payments.count; i++)             {                 @html.raw("<a href=../../payment/details/" + model.id + "/" + model.payments.elementat(i).accountid + ">" + model.payments.elementat(i).account.landioc + "</a>");                            @html.raw(" | ");             }         } 

model.payments.elementat(i).account null reason, although payment has 1 account , include account in our linq expression (paymentcontroller):

_erasdb.payments.include("account").include("event").where(...) 

we have no idea why account null. complete code, see:

http://pastebin.com/yf1jdsmf

multiple calls elementat pretty inefficient. switch foreach - should fix elementat returning null, more efficient, , simpler.

also, why not just:

<text> | </text> foreach(var payment in model.payments) {     <a href=../../payment/details/@model.id/@payment.accountid">@payment.account.landioc</a>               <text> | </text> } 

if using lots of @html.raw(...), you're missing trick... in particular, stand chance of opening xss holes if use .raw.