Support for persisted-key symmetric encryption.

Support for X509 certificates containing FIPS 186-3 DSA.

Improved support for localized error messages in data annotation validators.

Support for a touch/stylus stack based on Windows WM_POINTER messages.

Improved reliability of WCF applications and WCF serialization.

Ability to configure the default message security settings to TLS 1.1 or TLS 1.2.

Default operating system support for TLS protocols*.

Better support for control characters by the DataContractJsonSerializer.

Enhanced functionality with Elliptic Curve Cryptography (ECC)*.

Improvements that make SQL connections more resilient.

The ability to trace and sample activities.The ability to compact large object heaps on-demand.The ability to suspend and resume operations in the ASP.NET page framework.Performance and reliability improvements.Improvements which make SQL connections more resilient.It has improved the ability to trace and sample activities.It can compact large object heaps on-demand.It has the ability to suspend and resume operations in the ASP.NET page framework.Improvements have been made in performance and reliability.

Although, it is recommended by Microsoft that you use the Web Installer instead of the offline package for optimal efficiency and bandwidth requirements. It has both online and offline installers, the offline package can be useful in situations where the web installer can’t be used due to lack of internet connectivity. NET Framework 4.5.1 will come pre-installed with it, therefore, eliminating the need to update the framework. If you have already installed Windows 8.1 on your system then.

NET Framework 4.5.1 is a highly compatible and in-place update to the Microsoft. NET Framework 4.5.1 Offline Installer: The Microsoft.

Net frame download 4.5