Software Architecture for .Net

In many softwares as we see; if an update is made ; they simply produce a patch to it and hence
we can update the software using those patches.
We donot have to uninstall the old version and reinstall the updated version again;we simply apply
those updated patches.
I have developed a simple software.If in the future,if i have to make update.How can i make
such patches and apply to it?
What i mean is, what type of software architecture do we need to follow for this particular
problem?
biplavoAsked:
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Mohammed NasmanSoftware DeveloperCommented:
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samtran0331Commented:
how the update happens will depend on how your app is structured too...
for instance, if your installed app uses multiple dll's, you could update individual dll's without updating the entire app...
if your app is one big exe file, you need update only that one file..etc.

this is a nice article on autoupdating:
http://www.codeproject.com/vb/net/autoupdate.asp
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biplavoAuthor Commented:
Anyidea on how to develop plugins for the a particular module in an existing software?
If interface in .Net provides such facilities?
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angus_young_acdcCommented:
You would need to create your plugin, and update any DLLs that would be referenced to it etc.   Then you would have to recompile it and create the installer to update etc.

Thats why it is better to have your project split into multiple projects to create DLLs, then any updates will only require a few changes instead of updating the entire solution.  
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