Hi all,

I  have been going through the lots of Com Interop mails that have been
floating in this group and other groups.

I also went through the book by Dan Appleman. I have a basic question here.

If I have a three-tier application, and I plan to convert the same into
.NET, should I follow:

1.      The client conversion first, to work with existing COM business and
data layer. After this is done successfully, then go on with the business
layer and then the data layer.

2.      Start with the business/data( or both ) layer and let the client be
independent of this kind of a shift. After the client is working
successfully, then go ahead and change the client.


The advantages in the 2nd approach is that , the client interface in .NET
will change in the look and feel of it and so, this way you are not letting
your client using the user interface layer, feel the effort/burden of the
change to .NET. only when you are fully confident of this approach, then you
can think of letting the User Interface also change.


The advantage with the 1st approach is that, you are happy with the
performance of your business/data layer, and only when you have seen the
success of the User Interface working successfully , with the existing COM
business/data layer, do you plan to go in for further migration.


While I have said about ,each method, I am unable to decide, which point
should be scoring above the other????

Any pointers on the above or any kind of negation/further explanation of my
approach above would be highly appreciable.



Thanks In Advance,

Ajay Thakur
*HCL Perot Systems Ltd.,
'Shivalaya',Plot No. 123 EP-IP,
IInd Phase, Whitefield Industrial Area
Bangalore 560066.
* +91-80 - 8413000 to 8413009.  Xtn. - 2139
Fax: +91- 80- 841 2855
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"If you think you can do it, You are Right.
Just Be Passionate about what you think"
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