[negligible]

Hi,

I cannot build a project, written by an ex-employee, on my Windows 7 workstation. It works perfectly fine on the old XP machine he used and I have an exact copy.

Error	1	Mixed mode assembly is built against version 'v2.0.50727' of the runtime and cannot be loaded in the 4.0 runtime without additional configuration information.	C:\Working\Scan\v2.5.9.99\ConfigurationTool\ConfigurationTool\SGEN	ConfigurationTool

I have already searched for a solution to this error message but I have found that the solutions provided do not resolve the problem

This is how my config file started off, useLegacyV2RuntimeActivationPolicy is already present.

    <configuration>
      <startup useLegacyV2RuntimeActivationPolicy="true">
        <supportedRuntime version="v4.0"/>
        <requiredRuntime version="v4.0.20506"/>
      </startup>
    </configuration>

I have tried every suggested combination as well as different profile for full and client versions, as outlined in this thread with no results.

http://stackoverflow...-2-0-mixed-mode

Has anyone got a fix or any ideas on what could be causing the difference between the copies on different machines?

[modi123_1]

Is this a web app or a desktop app?

Also why not tell it you support v2.0 framework but require 4.0?

<supportedRuntime version="v2.0"/>
<requiredRuntime version="v4.0.20506"/>

[negligible]

This is a Form application.

I've already run through many different combinations in the config file. As outlined in this article:
http://msdn.microsof...y/ee517334.aspx

However none of them have worked when it has come to building the project.

.NET Framework version

XML

4 Client
<framework targetVersion="4.0" profile="Client" supportedRuntime="4.0.30319" />
4 Full
<framework targetVersion="4.0" profile="Full" supportedRuntime="4.0.30319" />
3.5 Client
<framework targetVersion="3.5" profile="Client" supportedRuntime="2.0.50727" />
3.5 Full
<framework targetVersion="3.5" profile="Full" supportedRuntime="2.0.50727" />
3.0
<framework targetVersion="3.0" supportedRuntime="2.0.50727" />

4 Client
<supportedRuntime version="v4.0.30319" sku=".NETFramework,Version=v4.0,Profile=Client" />
4 Full
<supportedRuntime version="v4.0.30319" sku=".NETFramework,Version=v4.0" />
3.5 Full
<supportedRuntime version="v2.0.50727"/>
3.5 Client
<supportedRuntime version="v2.0.50727" sku="Client"/>