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Broken ASP.NET 4.0 Project

Posted on 2014-02-04
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786 Views
Last Modified: 2014-02-05
I have an ASP.NET 4 project that was working and now it not working.

I'm using Visual Studio Professional 2013 (12.0.21005.1) and when I try to rebuild a particular ASP.NET 4.0 Web Application I get the following errors:

Type 'StringBuilder' is not defined.
Type 'List' is not defined.
Type 'Exception' is not defined.
Type 'iTemplate' is not defined.
Type 'SmptClient' is not defined.
Type 'System.IO.FileInfo' is not defined.
Type 'System.Web.UI.Page' is not defined.

etc.

Also, when I try adding a reference to System I get an error stating:
The Web site is already referencing the assembly 'System'

How do I fix this?  I have several Web Applications and this is the only one behaving this way.
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Question by:Ray Turner
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4 Comments
 
LVL 27

Accepted Solution

by:
Sammy earned 500 total points
ID: 39834810
Right click on your solution and click cCean Solution then build.
If this doesn't help, close your project, open your bin directory using windows explorer and delete all dlls from there then rebuild your project

good luck
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Author Comment

by:Ray Turner
ID: 39835178
Where is the Clean Solution in VS2013?
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LVL 27

Assisted Solution

by:Sammy
Sammy earned 500 total points
ID: 39836160
Its on the solution not the project, see the attached screen capture
2014-02-05-11-49-51.png
0
 

Author Closing Comment

by:Ray Turner
ID: 39836324
Thanks!  I'll try it next time.  For the sake of expediency, I downloaded the website; replacing my development code.  Everything is working fine now.
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