System.Web.Abstractions missing on a ASP.NET web site
I recently re-enabled feature on a ASP.NET site. This feature (a set of pages) had been running OK about six months ago for an initial pilot project but was disabled until now until a decision was made to develop the feature fully. In intervening time the web site had other modification and had been rebuilt (it was targeted at .NET 3.5) without issue.
When I re-enabled the feature (renamed a .ASPX file) I got the error
Could not load file or assembly 'System.Web.Abstractions, Version=188.8.131.52, Culture=neutral, PublicKeyToken=31bf3856ad364e35' or one of its dependencies. The system cannot find the file specified.
Now this surprised me, I had not change the .NET version targeting or changed development environment. In the end I fixed it by copying up the missing DLL to the bin directory. I had tried adding the following to the web.config to no effect
<assemblyIdentity name="System.Web.Abstractions" publicKeyToken="31BF3856AD364E35"/>
<bindingRedirect oldVersion="0.0.0.0-184.108.40.206" newVersion="0.0.0.0"/>
On think a bit more I think the issue must have been caused by:
- I may have upgraded to .NET to 3.5. SP1 in the time frame (but I thought I did it earlier)
- I have installed MVC on my development PC, and most other posts that mention this issue also mention MVC, usually beta versions.
EIther way it is fixed now
Read the complete post at http://blogs.blackmarble.co.uk/blogs/rfennell/archive/2009/04/24/system-web-abstractions-missing-on-a-asp-net-web-site.aspx