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I've installed Glass.Mapper.Sc (v4.3.4.196) with out any problems but in a razor view i can't use helper @Html.Glass() because i have an error that says that HtmlHelper does not contain a definition for Glass and no extension method Glass... i'm missing something?

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  • Do you have the Glass.Mapper references in your project? Before you install Glass.Mapper you need to reference the Sitecore.Kernel to make it work. Feb 2, 2017 at 14:05
  • 1
    Yes, i have Sitecore.Kernel, Glass.Mapper,Glass.Mapper.Sc and Glass.Mapper.Sc.Mvc references
    – Phoenix_uy
    Feb 2, 2017 at 14:06
  • Do you have the @using Glass.Mapper.Sc.Web.Mvc at the begining of your View? Feb 2, 2017 at 14:09
  • Adding that, i have the error The type 'Expression<>' is defined in an assembly that is not referenced. You must add a reference to assembly 'System.Core, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' (i have that reference)
    – Phoenix_uy
    Feb 2, 2017 at 14:10
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    Let us continue this discussion in chat. Feb 2, 2017 at 14:24

2 Answers 2

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The problem was with MVC setup in the project not with Glass. This was the solution - http://samirvaidya.blogspot.hu/2015/10/the-type-expression-is-defined-in.html.

The error was exactly

The type 'Expression<>' is defined in an assembly that is not referenced. You must add a reference to assembly 'System.Core, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089

And non of the HtmlExtensions was not working. Solution is that you need the following references in your web.config.

<compilation debug="true" targetFramework="4.5">
    <assemblies>
        <add assembly="System.Core, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089"/>
        <add assembly="System.Data, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089"/>
        <add assembly="Microsoft.CSharp, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a"/>
        <add assembly="System.Runtime, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" />   
        <add assembly="System.Web.Abstractions, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" />
        <add assembly="System.Web.Helpers, Version=3.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" />
        <add assembly="System.Web.Routing, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" />
        <add assembly="System.Web.WebPages, Version=3.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" />
        <add assembly="System.Web.Mvc, Version=5.2.3.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" />
    </assemblies>
</compilation>
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I added

@using Glass.Mapper.Sc.Web.Mvc 

on Top and it solved my problem

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