Assembly rebinding

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  • TobiasH

    #1

    Assembly rebinding

    Hi everyone,
    I have a (probably dumb) question in the scope of .Net's version
    rebinding capabilities:

    My application (lets call it myapp.exe v1.0.0.0) was compiled
    referencing an assembly (anassembly.dll ) with version 1.0.0.0.

    As the assembly was revised later, the current version (which is
    deployed) is now 2.0.0.0 (functionally, version 1 and 2 are fully
    compatible).

    In order to make use of version 2.0.0.0 I declared a rebinding in
    myapp.exe.confi g, like
    <dependentAssem bly>
    <assemblyIdenti ty name="myapp"
    publicKeyToken= "23422eg23e3222 22" />
    <bindingRedirec t oldVersion="1.0 .0.0-65535.65535.655 35.65535"
    newVersion="2.0 .0.0" />
    </dependentAssemb ly>

    So far so good.
    For some reasons that I do not want explain in detail, I decided to
    change the key, which was used to sign the assembly. Accordingly, I
    recompile anassembly.dll and increment the version number to 3.0.0.0.
    Let's assume, I do not have the chance to re-compile myapp.
    The task is now to deploy anassembly (version 3.0.0.0, publicKey:
    "fffffeeeeddddd cc") and being compatible with myapp.exe v1.0.0.0.
    Adapting the newVersion tag in myapp.exe.confi g is not sufficient
    since the public keys differ between the the version of anassembly,
    which was initially linked (v1.0.0.0, publicKey="2342 2eg23e322222")
    and the one which is deployed (version 3.0.0.0, publicKey:
    "fffffeeeeddddd cc") .
    My question:
    Is there any way to accomplish a rebinding of assemblies in the case,
    that the key has changed or is this explicitly prevented by .Net due
    to security reasons?

    Any help is appreciated...
    Tobias

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