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I am developing Web Application to upload a file on Google Drive but, there is a runtime exception as :- Could not load file or assembly 'System.Threading.Tasks, Version=1.5.11.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' or one of its dependencies. The located assembly's manifest definition does not match the assembly reference. (Exception from HRESULT: 0x80131040) I don't have any idea about this Please help me...

Ashwini Landge
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1 Answers1

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Try following approach:

  1. Open Visual Studio
  2. Go to Tools -> Library Package Manager -> Package Manager console
  3. Run the following command:

PM>Install-Package Microsoft.Bcl.Async

katherine heigl
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  • I am working with Visual studio 2010 and Couldn't find Tools -> Library Package Manager -> Package Manager console – Ashwini Landge Aug 25 '13 at 10:21
  • katherine heigl Please tell me what can I do now? – Ashwini Landge Aug 25 '13 at 10:30
  • 1.From the tools -> extension manager download : NuGet package manager 2.From the Visual studio 2010 go to Tools –> Library Package Manager –> Package manager console Also on the following link you can find information how to instal NuGet: [link] (http://docs.nuget.org/docs/start-here/installing-nuget#Installing_NuGet) – katherine heigl Aug 25 '13 at 11:15
  • I did it and again I run the application now it's giving me another exception somewhat like previous one as :- Could not load file or assembly 'System.Net.Http, Version=1.5.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' or one of its dependencies. The located assembly's manifest definition does not match the assembly reference. (Exception from HRESULT: 0x80131040) – Ashwini Landge Aug 25 '13 at 11:39
  • The same problem is resolved in following thread: [link](http://stackoverflow.com/questions/9431975/could-not-load-file-or-assembly-system-net-http-version-2-0-0-0-in-mvc4-web-ap) – katherine heigl Aug 25 '13 at 11:55
  • Additionally, I needed to copy the *.exe.config file from the build folder into the solution folder. Otherwise, the .dlls could not be referenced. – 00zetti May 15 '20 at 17:41
  • In Visual Studio 2019 it is Tools -> NuGet Package Manager -> Package Manager Console – Ravindra Gullapalli Dec 27 '21 at 11:59