.NET Framework 4.6 was announced on 12 November 2014.<ref name="net46">{{cite web|url=https://devblogs.microsoft.com/dotnet/announcing-net-2015-preview-a-new-era-for-net/|title=Announcing .NET 2015 Preview: A New Era for .NET|author=.NET Team|date=12 November 2014|access-date=27 February 2015|archive-date=9 May 2019|archive-url=https://web.archive.org/web/20190509050512/https://devblogs.microsoft.com/dotnet/announcing-net-2015-preview-a-new-era-for-net/|url-status=live}}</ref> It was released on 2015 July 2015.<ref name=":0">{{cite web|last1=Lander|first1=Rich|title=Announcing .NET Framework 4.6|url=http://blogs.msdn.com/b/dotnet/archive/2015/07/20/announcing-net-framework-4-6|website=.NET Blog|publisher=[[Microsoft]]|date=20 July 2015|quote=The team is updating the System.Security.Cryptography APIs to support the Windows CNG cryptography APIs [...] since it supports modern cryptography algorithms [Suite B Support], which are important for certain categories of apps.|access-date=20 July 2015|archive-date=8 October 2021|archive-url=https://web.archive.org/web/20211008175725/https://devblogs.microsoft.com/dotnet/announcing-net-framework-4-6/|url-status=live}}</ref> It supports a new [[just-in-time compiler]] (JIT) for 64-bit systems called RyuJIT, which features higher performance and support for [[SSE2]] and [[AVX2]] instruction sets. WPF and Windows Forms both have received updates for high DPI scenarios. Support for [[Transport Layer Security|TLS]] 1.1 and TLS 1.2 has been added to WCF.<ref name=":0" /><ref name="SysReq">{{cite web|title=.NET Framework System Requirements|url=https://msdn.microsoft.com/en-us/library/8z6watww(v=vs.110).aspx|website=MSDN|publisher=[[Microsoft]]|access-date=18 August 2016|archive-date=6 August 2016|archive-url=https://web.archive.org/web/20160806131605/https://msdn.microsoft.com/en-us/library/8z6watww(v=vs.110).aspx|url-status=live}}</ref> It is the last version to support [[Windows Vista]] SP2 and [[Windows Server 2008]] SP2.
The cryptographic API in .NET Framework 4.6 uses the latest version of [[Cryptography Next Generation|Windows CNG]] cryptography API. As a result, [[NSA Suite B Cryptography]] is available to .NET Framework. Suite B consists of [[Advanced Encryption Standard|AES]], the [[SHA-2]] family of hashing algorithms, [[elliptic curve Diffie–Hellman]], and [[elliptic curve DSA]].<ref name=":0" /><ref name="Suite B source">{{cite web|title=CNG Features § Suite B Support|url=https://msdn.microsoft.com/library/windows/desktop/bb204775.aspx#suite_b_support|website=Cryptography API: Next Generation|publisher=[[Microsoft]]|access-date=1 January 2016|archive-date=4 April 2016|archive-url=https://web.archive.org/web/20160404142617/https://msdn.microsoft.com/library/windows/desktop/bb204775.aspx#suite_b_support|url-status=live}}</ref>
