randypaulo 4:03 pm on December 16, 2011
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ESB Toolkit 2.1 using Enterprise Library 5.0


If you’re here probably you have a problem about this error:

[A]Microsoft.Practices.EnterpriseLibrary.Common.Configuration.ConfigurationSourceSection cannot be cast to [B]Microsoft.Practices.EnterpriseLibrary.Common.Configuration.ConfigurationSourceSection. Type A originates from ‘Microsoft.Practices.EnterpriseLibrary.Common, Version=4.1.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35’ in the context ‘Default’ at location ‘C:\Windows\assembly\GAC_MSIL\Microsoft.Practices.EnterpriseLibrary.Common\4.1.0.0__31bf3856ad364e35\Microsoft.Practices.EnterpriseLibrary.Common.dll’. Type B originates from ‘Microsoft.Practices.EnterpriseLibrary.Common, Version=5.0.505.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35’ in the context ‘Default’ at location ‘C:\Windows\assembly\GAC_MSIL\Microsoft.Practices.EnterpriseLibrary.Common\5.0.505.0__31bf3856ad364e35\Microsoft.Practices.EnterpriseLibrary.Common.dll’

Now there’s been lot of discussion how ESB Toolkit 2.1 breaks all other application that uses Enterprise Library 5.0 when deployed on the same machine, that’s because it updates the machine.config, which is the mother of all configs.

As of this moment there’s no fix regarding this matter. To undo the error that ESB Toolkit causes (see error above) you can follow the steps below:

Solution:

Step 1. You need to check the platform that your application targets, either 32bit or 64bit and the .NET Version. For BizTalk 2010 it’s 4.0. 

To check the Host whether it’s using 32bit (default) or 64bit explicitly. BizTalk Admin Console -> Platform Settings -> Hosts -> -> Properties -> Options -> 32-bit only flag.

Step 2. After determining the target platform,  open the Notepad.exe (Run as Administrator). It’s important to run it as administrator as we are going to edit the machine.config.

Step 3. Based on the platform open the machine.config using the Notepad.

32-bit: %Windows%\Microsoft.NET\Framework\v4.0.30319\Config

64-bit: %Windows%\Microsoft.NET\Framework64\v4.0.30319\Config

Step 4. Comment or remove the following sections:

Step 5. Save and restart the application/services/host instances.