CODEWITHSUNDEEP
asp.net.net-4.0
nickd
nickd

Reputation: 4011

Compilation error in .NET 4.0 web.config - Linq not found

I can compile and test my .NET 4.0 web application just fine within Visual Studio 2010. If, however I point my local IIS to the folder containing the application, I get the following error:

Compiler Error Message: CS0234: The type or namespace name 'Linq' does not exist in the namespace 'System' (are you missing an assembly reference?)
Source Error:
Line 388:                <add namespace="System.ComponentModel.DataAnnotations" />
Line 389:                <add namespace="System.Configuration" />
Line 390:                <add namespace="System.Linq" />
Line 391:                <add namespace="System.Text" />
Line 392:                <add namespace="System.Text.RegularExpressions" />

Source File: c:\Windows\Microsoft.NET\Framework\v4.0.30319\Config\web.config    Line: 390

How is it that the web.config from the framework won't compile for me?

I have found similar problems on the web and most just say 'add this reference...', but it can't be the right thing to edit the default web.config -- can it?

Upvotes: 19

Views: 42929

Answers (3)

Jamal
Jamal

Reputation: 766

This worked for me. Have this assemblies in the web.config file

<system.web>
   <compilation debug="true">
      <assemblies>
        <add assembly="System.Core, Version=3.5.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089"/>
        <add assembly="System.Data.DataSetExtensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089"/>
        <add assembly="System.Xml.Linq, Version=3.5.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089"/>
        <add assembly="System.Design, Version=2.0.0.0, Culture=neutral, PublicKeyToken=B03F5F7F11D50A3A"/>
        <add assembly="System.Web.Extensions.Design, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
        <add assembly="System.Windows.Forms, Version=2.0.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089"/>
      </assemblies>
   </compilation>
</system.web>

Upvotes: 60

Rez.Net
Rez.Net

Reputation: 1462

If you have a website, asp.net needs proper references to be able to compile it. A web application would not need that.

There are some assemblies referenced in the machine.config, some might be missing depending on your code, you can add them to machine.config or the root web.config.

Upvotes: 0

Sachin Shanbhag
Sachin Shanbhag

Reputation: 55489

I think you need to add the assemblies below in your web.config -

<add assembly="System.Core, Version=4.0.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089"/>

You will get System.Linq in core assembly

Upvotes: 25

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