[asp.net-mvc] Razor View Engine : An expression tree may not contain a dynamic operation

I have a model similar to this:

public class SampleModel
{
     public Product Product { get; set; } 
}

And in my controller I get an exception trying to print out

@Html.TextBoxFor(p => p.Product.Name)

This is the error:

Exception: An expression tree may not contain a dynamic operation

If anyone can give me some clues on how to fix this I would really appreciate it!

Before using (strongly type html helper into view) this line

@Html.TextBoxFor(p => p.Product.Name)

You should include your model into you page for making strongly type view.

@model SampleModel

A common error that is the cause of this is when you add

@Model SampleModel

at the top of the page instead of

@model SampleModel

Seems like your view is typed dynamic. Set the right type on the view and you'll see the error go away.

This error happened to me because I had @@model instead of @model... copy & paste error in my case. Changing to @model fixed it for me.

On vb.net you must write @ModelType.

In this link explain about @model, see a excerpt:

@model (lowercase "m") is a reserved keyword in Razor views to declare the model type at the top of your view. You have put the namespace too, e.g.: @model MyNamespace.Models.MyModel

Later in the file, you can reference the attribute you want with @Model.Attribute (uppercase "M").