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Important This document may not represent best practices for current development, links to downloads and other resources may no longer be valid. Current recommended version can be found here.

What's New in the .NET Framework

This section summarizes features that have been added or modified in the latest versions of the .NET Framework.

For more information about breaking changes that might affect your application, see Breaking Changes in the .NET Framework.

What's New in the .NET Framework Version 3.5 SP1

Describes the features that are new in the 3.5 SP1 version.

What's New in the .NET Framework Version 3.5

Describes the features that are new in the 3.5 version.

What's New in the .NET Framework Version 3.0

Describes the features that are new in the 3.0 version.

What's New in the .NET Framework Version 2.0

Describes the features that are new in the 2.0 version.

What's New in the .NET Framework Version 1.1

Describes the features that are new in the 1.1 version.

Version Compatibility

Provides information about backward and forward compatibility. For more information about breaking changes that might affect your application, see Breaking Changes in the .NET Framework.

Overview of the .NET Framework

Provides conceptual overviews of the key features of the .NET Framework, including the common language runtime, the.NET Framework class library, and cross-language interoperability.

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