formcollection will not work in my case because I am not binding the model values to the form controls. So form collection will not work in my case.

In my case, I am setting few values during get  request and  using them during post. I am not dispalying them in my form thats why I used hidden fields.

I cannot use the session approach beacuse there is a custom validation attribute at class level where I need those hidden value fields. And I don't want to use session in my Model and Custom attribute class.

Any other suggestion?