Building Web Apps with ASP.NET Jump Start – 01 What’s New in ASP.NET 4.5

Source – Building Web Apps with ASP.NET Jump Start

In order to do web development, you need to understand the following:

Visual Studio

  • HTML5 and CSS3 standards and smarts
  • JavaScript language features
  • Page Inspector
  • One code editor for client and server
  • Web Essentials extension


  • Package manager – new way to bring dependencies into the project
  • Install and configure in your project
  • Handle dependencies and versions


  • Model Binding with ASP.NET Web Forms – Strongly Typed Data Controls
  • Web Forms Friendly URLs
  • Same routing system as MVC – in fact the routing system houses in ASP.NET but MVC also uses it
  • Bundling and Optimization
  • LESS editor
  • Page Inspector
  • async
    • async and threading are kind of different
    • Client.DownloadStringTaskAsync
    • Task.WaitAll – blocks the current thread until all of the specified async requests have completed
    • Task.WhenAll – will wait for all of the specified async requests to finish before returning
    • “Async” and “await” keywords
    • “Async = true” on the page

nuget “Access is denied” “Command existed with code 5”

I just setup a new Windows Server 2008 R2 development VM in order to work on a project. Downloaded the source code from Git and hit “Rebuild Solution”. Few projects failed to build with the following error (taken from the Output window after enabling MSBuild verbosity to Detailed:

Task “Exec” “C:\Work\Github\………….\.nuget\nuget.exe” install “C:\Work\Github\…………\packages.config” -source “”  -RequireConsent -solutionDir “C:\Work\Github\…………….\ “

C:\Work\Github\…….\.nuget\NuGet.targets(87,9): error : Access is denied.

C:\Work\Github\…..\.nuget\NuGet.targets(87,9): error MSB3075: The command “”C:\Work\Github\…..\.nuget\nuget.exe” install “C:\Work\Github\…..\packages.config” -source “”  -RequireConsent -solutionDir “C:\Work\Github\…..\ “” exited with code 5. Please verify that you have sufficient rights to run this command.
Done executing task “Exec” — FAILED.

The NuGet executable could not be executed during the build process! I had never faced this problem before. Came across few posts on the Internet where others were facing similar problems and had recommended to change certain NuGet settings or to delete and reinstall NuGet altogether. I did all that but no use.

I manually ran the nuget.exe in a command prompt and got the same “Access is denied” error. All of a sudden, light-bulb moment Smile I looked at the properties of the nuget.exe and that is where the answer was! See below the screen shot.


Perhaps this is Windows Server 2008 security feature but the Everyone was allowed only “Read” permission on the nuget.exe; in order for it to get executed, the caller should have the “Read & Execute” permission as well.

Granting the “Everyone” group “Read & Execute” seems to solve the problem.


I would love to hear if you know of a better way to solve this issue. Drop me a line. Thanks.