Could not load file or assembly 'System.Web.Http, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' or one of its dependencies. The system cannot find the file specified.

When you move the code from local to another server, you may get an error:

Could not load file or assembly ‘System.Web.Http, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35’ or one of its dependencies. The system cannot find the file specified.

This error is usually due to missing or error 4 Microsoft .NET Framework 4 files, the cause may be because when exporting the project from visual studio you did not choose CopyLocal = true leading to error message missing file.

The files are missing error like the attached image, you need to export the options CopyLocal = True then check the bin directory to see if there are enough files.

Usually includes the following files:

System.Web.Http.dll
System.Web.Http.Webhost.dll
System.Net.Http.Formatted.dll

Diệp Quân

Nguyen Manh Cuong is the author and founder of the vmwareplayerfree blog. With over 14 years of experience in Online Marketing, he now runs a number of successful websites, and occasionally shares his experience & knowledge on this blog.

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