I am currently working on a ASP.NET web application that allows users to upload shapefiles to store data in the database. For everything to work smoothly, I need the coordinate system to be NAD83, is it possible for me to convert whatever coordinate system is being uploaded to NAD83 format? I am ArcObjects SDK for .NET installed, but my knowledge about GIS is very minimal (first time working on a GIS-based application). I have the following files: shp, dbf, prj, shx and sbn for each feature. If anyone has ideas on how to go about doing something like this, I would greatly appreciate the help.