Home/ Questions/Could not load file or assembly microsoft web infrastructure - simple solution when encountering the error
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Oscar Rodriguez
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Asked: 2022-05-18T21:25:30+00:00 In:

Could not load file or assembly microsoft web infrastructure – simple solution when encountering the error

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I get the “could not load file or assembly microsoft web infrastructure” issue when trying to upload everything in my localhost wwwroot folder to the server. Here is the detail of the error I got the error message:

Exception information: 
  Exception type: InvalidOperationException 
  Exception message: The pre-application start initialization method Start on type RouteDebug.PreApplicationStart threw an exception with the following error message: Could not load file or assembly 'Microsoft.Web.Infrastructure, Version=1.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' or one of its dependencies. The system cannot find the file specified..
  at System.Web.Compilation.BuildManager.InvokePreStartInitMethods(ICollection`1 methods)
  at System.Web.Compilation.BuildManager.CallPreStartInitMethods()
  at System.Web.Hosting.HostingEnvironment.Initialize(ApplicationManager appManager, IApplicationHost appHost, IConfigMapPathFactory configMapPathFactory, HostingEnvironmentParameters hostingParameters, PolicyLevel policyLevel, Exception appDomainCreationException)
 
 Could not load file or assembly 'Microsoft.Web.Infrastructure, Version=1.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' or one of its dependencies. The system cannot find the file specified.
  at RouteDebug.PreApplicationStart.Start()

Please give me some advice to solve this problem.

microsoft web infrastructure
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2 Answers

  1. Best Answer
    Expert

    The cause: I think the cause is that you didn’t include the dll with your project and add a reference to it.

    Solution: You can fix this error by:

    In Visual Studio, go to Tools/Library Package Manager/Package Manager Console

    <PM> Install-Package Microsoft.Web.InfraStructure
    • 0

  2. After performing a Reference Cleaning, it deleted Microsoft.Web.Infrastructure but not from the packages.config files. Visual Studio claims it has already been installed, despite the fact that it tried to add it using Package Manager Console.

    The packages.config file was then deleted. 

    <package id="Microsoft.Web.Infrastructure" version="1.0.0.0" targetFramework="net45" />

    The command was again run 

    PM> Install-Package Microsoft.Web.Infrastructure

    Now it works perfectly.

    • 14

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