Visual Studio 2010 - TypeLoadException During Publish

Hi: 

I am having trouble publishing my website...sometime it will publish, sometimes it will not...even without changing anything. 

After Debugging the compile, when the solution publishes, I do not get a TypeLoadException.   When the publish doesn't go through, it is an error on a page that I built.  The error is a TypeLoadException....Cound not load type "MySolutionNameSpace.WebPageClass" from assembly.   The .dll is being built during the publish. 

If I rename the class in the application, it appears to load that assembly fine, and it gives an error on another assembly (on a page that I built).  

I have

      cleaned my .dlls

      my webconfig I set a different tempDirectory each time.  

       I close VS,

       and even Reboot..and no luck.   

During debugging the compile, and I get the error, I viewed the assembly during publish as soon as I get the error and everything in the .dll appears fine....meaing, what it is trying to load is  in the .dll   I am at a standstill. 

I am using Visual Studio 2010 Professional   Version 10.040219.1 SP1Rel    Microsoft .Net Framework Version 4.5.50938 SP1 Rel.  The application runs fine as expected.