Configuration :: How To Load System.Data.DataSetExtensions Dll Although It Is In Bin And In Gac
Nov 9, 2010
In our web site project we need to reference the assembly System.Data.DataSetExtensions, 4.0.0.0. So we added a reference to it in the webconfig, but we are getting the following error on build:
error CS0012: The type 'System.Data.TypedTableBase`1<T0>' is defined in an assembly that is not referenced. You must add a reference to assembly 'System.Data.DataSetExtensions, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089'. We added the dll version 4.0.0.0 in the bin folder of the site just in case. At first in gac there was only version 3.5.0.0 of this dll, but we installed the 4.0.0.0 version via gacutil.exe. Now when we check with "gacutil.exe /l" the correct assembly version (4.0.0.0) appears to be loaded in gac, but we can not see it in the windows explorer in windows/assembly folder (there is only version 3.5.0.0). And we are still getting the same error. Obviously we missed something, but the question is what ?
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References
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[Code]....
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Things of note:
A simple IIS Reset fixes the issue. We had the same code running on a single webserver with no problems. We then moved the site to two new, load balanced (using sticky sessions) webservers (all three Windows Server 2003 R2 Standard Edition SP1). Now each of the load balanced webservers throw this exception about once a week just out of the blue.The only major difference I can think of, is I've installed the 4.0 .NET framework on the load balanced servers. The website is still running under ASP.NET 2.0 so I don't see how this would be an issue I've configured the indexing service to not search the "Temporary ASP.NET Files" folder, but it didn't help. We use the Microsoft.Practices.EnterpriseLibrary.Data dll everywhere on our site. Almost every single page uses our logic dll which in turn utilizes the EnterpriseLibrary dlls. While the errors where happening once, I even looked to see what processes were locking the dll in the "Temporary ASP.NET Files" folder, and it wasn't any different than the locks on the server that was working fine. Once the error starts, it errors every single time until an iisreset is performed.
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