Home/ Questions/Q 1808724
In Process

The Archive Base Latest Questions

Editorial Team
  • 0
Asked: 2026-05-17T06:17:53+00:00

I am using VS2010 + C# + .Net 4.0 + IIS 7.5 + Windows

  • 0

I am using VS2010 + C# + .Net 4.0 + IIS 7.5 + Windows 7. When I open a WCF svc file in IIS 7.0, there is some error like this, any ideas what is wrong?

System.BadImageFormatException: Could not load file or assembly ‘foo.test’ or one of its dependencies.

Share

Leave an answer

You must login to add an answer.

Need An Account,

1 Answer

  1. Editorial Team

    Probably the application pool is configured to target CLR 2.0. You need to change it to target .NET 4.0:

    alt text

    Also make sure .NET 4.0 is registered by running:

    %WINDIR%\Microsoft.NET\Framework\v4.0.30319\aspnet_regiis.exe -i
    • 0