.NET Framework 4.5.1 was released on 17-10-2013 along visual studio 2013, it’s required windows vista SP2 or later. in this article I will telling you what new in this .Net Framework 4.5.1 Version.

So this version of .NET had bunch of good updates some of them are listed below:

• Update Portable Class Library Templates: Since I had mentioned about visual studio 2013,and this is included updates to the portable class library templates. This will allow you to using Windows Runtime APIs in portable libraries that target windows 8.1, windows phone 8.1 and windows phone Silverlight 8.1. you can also include XAML (Windows.UI.XAML types) in portable libraries, you can create a portable windows runtime component, for use in store apps. And also you can retargeted windows store or windows phone store class library like a portable class library
• Documentation for .NET Native, is a precompilation technology for building and deploying windows store apps. And .Net native will compiles your apps directly to native code, for a better performance
• .net Framework Reference Source, you can now browse through the .NET Framework source code online.

New Features and enhancements in the .NET Framework 4.5.1:

• Automatic binding redirection for assemblies.
• Collect diagnostics information: this feature is really help the developer to improve the performance of server and cloud application.
• Explicitly compact the large object heap during garbage collection.
• Additional performance improvements such as ASP.NET app suspension, multi-core JIT improvements and faster app startup after a .NET Framework updates.

Improvements when debugging your .NET Framework

• Return Value in the visual Studio Debugger, when you debug a managed app in VS 2013, the autos windows displays return types and values for method this information is available not only for desktop, and windows stro but also in windows phone apps.
• 64-Bit Edit and Continue support in Visual Studio 2013
• Inspecting Method return value while debugging using Autos Window as well as a pseudo variable $ReturnValue
• ADO.NET Connection Resiliency
• Async Debugging Enhancements : To make it easier to debug asynchronous apps in Visual Studio 2013, the call stack hides the infrastructure code provided by compilers to support asynchronous programming, and also chains in logical parent frames so you can follow logical program execution more clearly
• Better exception In Windows 8.1, exceptions that arise from Windows Store apps preserve information about the error that caused the exception, even across language boundaries
• Those are some sort list of what’s new in .NET Framework 4.5.1 you may want to updated your .NET Framework for since they updating much especially in the debugging parts.