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Assembly dependencies in a three-tier webapp, how to update layers seperately

I`m developing a three-tier webapplication using stored procedures as my
method for accessing my database. In Visual Studio I have a web project, a
business logic project and a data-access project, each resulting in its own
dll.

Now lets say I wantet to update my data-access layer to use standard ansi
sql queries. Is there a way of implementing this architecture that allows my
to update only a single .dll on a client server without the project crashing
miserably.

I have tested this idea, but I can't get it to work. When I overwrite my
existing data.dll with a new one my businesslogic layer crashed with the
error:
The located assembly's manifest definition with name 'Minas.Data' does not
match the assembly reference.

How do I solve this? There has to be a way.... either by using another
architecture from the get go, or my some other means ... I cant't see the
point of splitting the layers into different projects in visual studio if I
can't update them seperately...

Am I missing something? Is there a better way of solving my problem?
Nov 16 '05 #1
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