How do you upload data to database using 3tier architecture c#
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This depend on how do you create the 3-tiers project and which technology you are using, Ado.Net, Linq to Sql or Entity Framework. Here're some links about 3-tiers architecture in different technologies, please refer to them.
If you need further help, please feel free to let me know. I will be more than happy to be of assistance.
Allen Li [MSFT]
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