I have an action method without parameters.

The `QueryString` collection contain all of my values. The keys of the `QueryString` match my view model properties. 

```
var queryStringValueProvider = new QueryStringValueProvider(ControllerContext);
var providerResult = queryStringValueProvider.GetValue(ValidationKeys.Id); // ?!

var viewModelTypeName = queryString[ValidationKeys.ViewModelType];

var viewModelType = Type.GetType(viewModelTypeName);
var viewModelInstance = providerResult.ConvertTo(viewModelType); // throws an InvalidOperationException

```

How can I convert the `QueryString` collection to a view model?
ASP.NET MVC already do this when you just pass the view model into the action method parameters. So what I need is an **afterwards model binding** using ASP.NET MVC mechanics.