General Upgrade Issues from ADO to ADO.NET
You have a number of architectural issues to consider when converting your codebase to work within the managed code of the Microsoft .NET Framework. ADO.NET walks a fine line: The ADO.NET object model is similar enough to ADO as to be instantly familiar to an ADO developer, yet your ADO code will not work without modifications in a .NET Windows form or Web form application. If you've worked with ADO, you're going to feel at home with ADO.NET, but you're going to have to spend a significant amount of time upgrading your codebase.
The next few sections discuss some of the major architectural changes you'll face upgrading from ADO to ADO.NET.
ADO.NET Completely Disconnected
ADO.NET is a completely disconnected ...
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