Question

I have a strongly-typed view with a @model declaration:

@model MyViewModel

When using extension methods like this in my Razor views:

@Html.TextBoxFor(m => m.Foo)

Visual Studio shows errors like this:

The type arguments for method ‘System.Web.Mvc.Html.InputExtensions.TextBoxFor<TModel,TProperty>(System.Web.Mvc.HtmlHelper<TModel>, System.Linq.Expressions.Expression<System.Func<TModel,TProperty>>)’ cannot be inferred from the usage. Try specifying the type arguments explicitly.

These are only errors shown for the editor window; the view renders just fine at runtime.

Does this happen for everyone, or is there something I can do to make the Razor editor work better?

Answer 1

Thanks to this answer, I found the solution. In my web.config, once I specified a targetFramework attribute in my system.web/compilation config section, all of those nasty warnings disappeared. Previously, no targetFramework was specified. Strangely, Visual Studio doesn’t just use the target framework of your project:

<compilation debug="true" targetFramework="4.0">
  <!-- ... -->
</compilation>