title: website compile error
body: <p>I am experiencing the following error while loading a website:</p>
  
  <pre>
  Server Error in '/DatingGridView' Application.
  Configuration Error
  Description: An error occurred during the processing of a configuration file required to service this request. Please review the specific error details below and modify your configuration file appropriately.
  
  Parser 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.
  
  Source Error:
  
  Line 52:        
  Line 53:            
  Line 54:                
  Line 55:            
  Line 56:        
  
  
  Source File: D:\VSProjects\DatingGridView\web.config    Line: 54
  
  Assembly Load Trace: The following information can be helpful to determine why the assembly 'System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' could not be loaded.
  
  === Pre-bind state information ===
  LOG: User = PassionFruit-PC\PassionFruit!!!
  LOG: DisplayName = System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35
   (Fully-specified)
  LOG: Appbase = file:///D:/VSProjects/DatingGridView/
  LOG: Initial PrivatePath = D:\VSProjects\DatingGridView\bin
  Calling assembly : (Unknown).
  ===
  LOG: This bind starts in default load context.
  LOG: Using application configuration file: D:\VSProjects\DatingGridView\web.config
  LOG: Using machine configuration file from C:\Windows\Microsoft.NET\Framework\v2.0.50727\config\machine.config.
  LOG: Post-policy reference: System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35
  LOG: Attempting download of new URL file:///C:/Users/PassionFruit!!!/AppData/Local/Temp/Temporary ASP.NET Files/datinggridview/5a514f00/39d65547/System.Web.Extensions.DLL.
  LOG: Attempting download of new URL file:///C:/Users/PassionFruit!!!/AppData/Local/Temp/Temporary ASP.NET Files/datinggridview/5a514f00/39d65547/System.Web.Extensions/System.Web.Extensions.DLL.
  LOG: Attempting download of new URL file:///D:/VSProjects/DatingGridView/bin/System.Web.Extensions.DLL.
  LOG: Attempting download of new URL file:///D:/VSProjects/DatingGridView/bin/System.Web.Extensions/System.Web.Extensions.DLL.
  LOG: Attempting download of new URL file:///C:/Users/PassionFruit!!!/AppData/Local/Temp/Temporary ASP.NET Files/datinggridview/5a514f00/39d65547/System.Web.Extensions.EXE.
  LOG: Attempting download of new URL file:///C:/Users/PassionFruit!!!/AppData/Local/Temp/Temporary ASP.NET Files/datinggridview/5a514f00/39d65547/System.Web.Extensions/System.Web.Extensions.EXE.
  LOG: Attempting download of new URL file:///D:/VSProjects/DatingGridView/bin/System.Web.Extensions.EXE.
  LOG: Attempting download of new URL file:///D:/VSProjects/DatingGridView/bin/System.Web.Extensions/System.Web.Extensions.EXE.
  
  
  Version Information: Microsoft .NET Framework Version:2.0.50727.1433; ASP.NET Version:2.0.50727.1433 </pre>