someone build a web application and then gave it to me for further development. When I tried to compile the application (that was given to me on my local machine) before I do any changes to the original source code, I received the following compilation error message:
Could not load file or assembly 'System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' or one of its dependencies. The system cannot find the file specified.
When I click on this error message, it opens for me (Web.config) file and points to me at this line: