Could not load file or assembly 'Microsoft.Web.Infrastructure, Version=126.96.36.199, Culture=neutral, PublicKeyToken=31bf3856ad364e35' or one of its dependencies. The system cannot find the file specified.What 'Micorosoft.Web.Infrastructure' does?This dll lets HTTP modules register at run time.Solution to above problem:Copy 'Micorosoft.Web.Infrastructure' dll in bin folder of your project and this problem should be resolved. If you have .Net framework installed on machine, this dll should be present on it. You can search for this dll and copy it in your active project folder. Alternatively, you can install this dll using nuget package managerPM> Install-Package Microsoft.Web.Infrastructure -Version 1.0.0Happy coding!!