---
title:        "Supporting multiple versions of assemblies"
description:  "Remove the xmlns tag: \"http://schemas.microsoft.com/.NetConfiguration/v2.0\" from the tag which can be found in the beginning of the web.config. Add the following code in the section of the web.config below the : Note: you can find the public key token by running the following command from the \"Visual Studio 200x Command Prompt\" sn.exe -T myDLL.dll."
url:          https://www.jeroenfurst.nl/blog/Supporting-multiple-versions-of-assemblies
date:         2010-01-19
category:     Upgrades and hotfixes
tags:         [Upgrades and hotfixes]
reading_time: 1
---

# Supporting multiple versions of assemblies

> Remove the xmlns tag: "http://schemas.microsoft.com/.NetConfiguration/v2.0" from the tag which can be found in the beginning of the web.config. Add the following code in the section of the web.config below the : Note: you can find the public key token by running the following command from the "Visual Studio 200x Command Prompt" sn.exe -T myDLL.dll.

Remove the xmlns tag: "[http://schemas.microsoft.com/.NetConfiguration/v2.0](http://schemas.microsoft.com/.NetConfiguration/v2.0)" from the <configuration> tag which can be found in the beginning of the web.config.

Add the following code in the <configuration> section of the web.config below the <configSecionts>:

<runtime> 
 <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1"> 
 <dependentAssembly> 
 <assemblyIdentity name="CMS.WorkflowEngine" publicKeyToken="834b12a258f213f9" culture="neutral" />
 <bindingRedirect oldVersion="4.1.3518.21555" newVersion="4.1.3603.27471" />
 </dependentAssembly> 
 </assemblyBinding> 
 </runtime>

Note: you can find the public key token by running the following command from the "Visual Studio 200x Command Prompt" 
 
 sn.exe -T myDLL.dll.