# .NET Framework 4.5 Release Notes

You can learn about the changes made in the .NET Framework 4.5.

The .NET Framework 4.5 is no longer supported by Microsoft.

- [.NET Framework 4.5 announcement blog post](https://blogs.msdn.microsoft.com/dotnet/2012/08/15/announcing-the-release-of-net-framework-4-5-rtm-product-and-source-code/)
- [What's new in the .NET Framework 4.5](https://docs.microsoft.com/dotnet/articles/framework/whats-new/index#v45)
- [Application compatibility](../../Documentation/compatibility/README.md#net-framework-45)
- [Known issues](https://support.microsoft.com/en-us/help/2890857/known-issues-for-the-.net-framework-4.5)