If we have two version of same assembly in GAC how do we make a

If we have two version of same assembly in GAC how do we make a
choice ?
OK first let’s try to understand what the interviewer is talking about. Let’s say you have made an
application and its using a DLL which is present in GAC. Now for some reason you make second
version of the same DLL and put it in GAC. Now which DLL does the application refer? Ok by
default it always refers the latest one. But you want that it should actually use the older version.
So first we answer in short. You need to specify “bindingRedirect” in your config file. For instance
in the below case “ClassLibraryVersion” has two versions “1.1.1830.10493” and “1.0.1830.10461”
from which “1.1.1830.10493” is the recent version. But using the bindingRedirect we can specify
saying “1.0.1830.10461” is the new version. So the client will not use “1.1.1830.10493”.




publicKeyToken="b035c4774706cc72"
culture="neutral"/>
newVersion= "1.0.1830.10461"/>




Ok now I will try to answer it in long way by doing a small sample project. Again this project will
be done using C#. So in CD you can find the “Versioning” project. Below is the solution display,
it has two projects one the windows client project ( “WindowsVersioningCSharp” ) and second
the class library project ( “ClassLibraryVersion” ) which will be installed in GAC with two versions.