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How to Migrate Your .NET 3.5 App to .NET 4

| Monday, April 19, 2010
Your .NET Framework 3.5 installs side-by-side with .NET Framework 4. So your application will work as expected when your customer installs .NET 4. But when you take your current code from .NET 3.5 and recompile it and target your application for .NET 4 in Visual Studio 2010, you may find some breaking changes.

Migration issues between the .NET Framework version 3.5 Service Pack 1 and the .NET Framework version 4, including fixes, changes for standards compliance and security, and changes based on customer feedback. Most of these changes do not require any programming modifications in your applications. The table provides steps that for you to take too.

Changes between .NET 3.5 and .NET are listed on .NET Framework 4 Migration Issues. Topics include notable changes in the following areas:

Read more: ISV Developers Community

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