Click here to Skip to main content
13,042,421 members (121,798 online)
Click here to Skip to main content
Add your own
alternative version

Tagged as


1 bookmarked
Posted 26 Apr 2012

Load same assemblies with different versions

, 26 Apr 2012
Rate this:
Please Sign up or sign in to vote.
Load different version of same assemblies in the wpf application


Normally we can load only the same version of assemblies into an application. But now the requirement is, we have a WPF application and also a class library. Our class library will have version 5.0 of assemblies and my exe project will having the 3.0 version of the assemblies. We need to load these versions of assemblies into the exe project. 

Using the code 

To execute the above requirement, we should do the following steps very carefully.

  1. Add the app.config file in the application.
  2. When we create the WPF application, by default, we will not have the app.config file in the application as in the ASP.NET project. But we can achieve this by doing a couple of steps.

    1. Right click in the project properties and choose the ApplicationConfiguration file and the name should be App.config [not App1.config as it suggests].
    2. Add Reference to the application.
    3. Then finally it will execute the app.config settings to the current application.

  3. Add the following settings in the app.config file.
  4. We can load the assemblies with different versions into the project using the following syntax. We can learn more details in the below MSDN link:

    The following syntax should be added in the app.config file:

        <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
            <assemblyIdentity name="A.wpf.dll" publicKeyToken="3d67ed1f87d44c89" />
            <codeBase version="3.0" href="...\A.wpf.dll"/>
            <codeBase version="5.0" href="...\A.wpf.dll"/>
            <assemblyIdentity name="B.wpf.dll" publicKeyToken="632609b4d040f6b4" />
            <codeBase version="3.0" href="...\B.wpf.dll"/>
            <codeBase version="5.0" href="...\B.wpf.dll"/>

By the above syntax I just want to add A.wpf.dll and B.wpf.dll in the respective project. The public key token needs to be added for the corresponding assembly. We can generate the public key token by executing the following command in the Visual Studio command prompt.

C:\Program Files (x86)\Microsoft SDKs\Windows\v7.0A\Bin   sn.exe -T  [ assembly name ].

Wow...Finally my trial was successful and everything worked fine. So now we can load assemblies with different versions...


This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)


About the Author

David Bekham
Software Developer
India India
David working as a WPF and Silverlight developer in Chennai. He actually doing the custom control development in the WPF/Silverlight platforms.

You may also be interested in...


Comments and Discussions

-- There are no messages in this forum --
Permalink | Advertise | Privacy | Terms of Use | Mobile
Web02 | 2.8.170713.1 | Last Updated 26 Apr 2012
Article Copyright 2012 by David Bekham
Everything else Copyright © CodeProject, 1999-2017
Layout: fixed | fluid