MVC 2 with VS 2010 View Building Error: the anonymous types function cannot be used because it is not part of the ISO-2 C # language specification

I have a collaborative project that stores all my own EditTemplates and DisplayTemplates. This is a typical C # class library project with views marked as embedded resources. The target structure of this project is ".Net Framework 4".

Inside / Views / folder, I included this web.config file to get MVC 2 intellisense when working with .aspx and .ascx files:

<?xml version="1.0"?>
<configuration>
  <system.web>
    <httpHandlers>
      <add path="*" verb="*" type="System.Web.HttpNotFoundHandler"/>
    </httpHandlers>
    <pages
        validateRequest="false"
        pageParserFilterType="System.Web.Mvc.ViewTypeParserFilter, System.Web.Mvc,     Version=2.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"
    pageBaseType="System.Web.Mvc.ViewPage, System.Web.Mvc, Version=2.0.0.0,     Culture=neutral, PublicKeyToken=31BF3856AD364E35"
        userControlBaseType="System.Web.Mvc.ViewUserControl, System.Web.Mvc, Version=2.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35">
      <controls>
        <add assembly="System.Web.Mvc, Version=2.0.0.0, Culture=neutral,   PublicKeyToken=31BF3856AD364E35" namespace="System.Web.Mvc" tagPrefix="mvc" />
      </controls>
    </pages>
  </system.web>
  <system.webServer>
    <validation validateIntegratedModeConfiguration="false" />  
    <handlers>
      <remove name="BlockViewHandler"/>
      <add name="BlockViewHandler" path="*" verb="*" preCondition="integratedMode"    type="System.Web.HttpNotFoundHandler" />
    </handlers>
  </system.webServer>
</configuration>

Usually I have no problems with this setting, but once and while I get an error message when compiling my views:

Error 3 The function "anonymous types" cannot be used because it is not part of the ISO-2 language C # specification

, :

<%@ Control Language="C#" Inherits="System.Web.Mvc.ViewUserControl" %>
<%@ Import Namespace="System.Web.Mvc.Html" %>
<%
    string displayText = string.Empty;

    if (Model != null)
    {
        if (DateTime.Parse(Model.ToString()) != DateTime.MinValue)
            displayText = DateTime.Parse(Model.ToString()).ToShortDateString();
    }
%>

<%= Html.TextBox("", displayText, new { @class = "date-box" })%>

. , . , " " " 3", , ISO-2 # " ?