Razor View Engine : An expression tree may not contain a dynamic operation

It seems to me that you have an untyped view. By default, Razor views in MVC3 RC are typed as dynamic. However, lambdas do not support dynamic members. You have to strongly type your model. At the top of your view file add

@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