updated some news links (#5092)

* updated some news links

* feedback

Author: mairaw

docs/welcome.md

@@ -1,40 +1,37 @@
 ---
 title: Welcome to .NET
 description: Getting started with the .NET family of technologies.
-keywords: .NET, .NET Core, getting started, news
 author: mairaw
 ms.author: mairaw
-ms.date: 08/14/2017
+ms.date: 04/30/2018
 ms.topic: article
-ms.prod: .net
+ms.prod: dotnet
 ms.devlang: dotnet
-ms.assetid: cb788dcf-2120-467f-9c34-c02a90e1f68f
+ms.custom: "updateeachrelease"
 ---
 # Welcome to .NET
 
-See [Getting Started with .NET Core](core/get-started.md) to learn how to create .NET Core apps.
+See [Get started with .NET Core](core/get-started.md) to learn how to create .NET Core apps.
 
 Build many types of apps with .NET, such as cloud, IoT, and games using free cross-platform tools. Your apps can run on Android, iOS, Linux, macOS, and Windows. Deploy apps to servers or desktops and publish to app stores for deployment on mobile devices. .NET is accessible to students and hobbyists, and all are welcome to participate in a lively international developer community and make direct contributions to many of the .NET technologies.
 
 ## News
 
+- [Microsoft Build 2018](https://channel9.msdn.com/Events/Build/2018)
+- [Announcing the .NET Framework 4.7.2](https://blogs.msdn.microsoft.com/dotnet/2018/04/30/announcing-the-net-framework-4-7-2/)
+- [Announcing .NET Core 2.1 Preview 2](https://blogs.msdn.microsoft.com/dotnet/2018/04/11/announcing-net-core-2-1-preview-2/)
+- [ASP.NET Core 2.1.0-preview2 now available](https://blogs.msdn.microsoft.com/webdev/2018/04/12/asp-net-core-2-1-0-preview2-now-available/)
+- [Announcing Entity Framework Core 2.1 Preview 2](https://blogs.msdn.microsoft.com/dotnet/2018/04/11/announcing-entity-framework-core-2-1-preview-2/)
+- [Visual Studio 2017 version 15.6, Visual Studio for Mac version 7.4 Released](https://blogs.msdn.microsoft.com/visualstudio/2018/03/06/visual-studio-2017-version-15-6-visual-studio-for-mac-version-7-4-released/)
+- [Welcome to C# 7.2 and Span](https://blogs.msdn.microsoft.com/dotnet/2017/11/15/welcome-to-c-7-2-and-span/)
 - [.NET Core 2.0 Released!](https://channel9.msdn.com/Blogs/dotnet/NET-Core-20-Released)
-- [Announcing .NET Core 2.0](https://blogs.msdn.microsoft.com/dotnet/2017/08/14/announcing-net-core-2-0/)
 - [Announcing .NET Standard 2.0](https://blogs.msdn.microsoft.com/dotnet/2017/08/14/announcing-net-standard-2-0/)
-- [Announcing ASP.NET Core 2.0](https://blogs.msdn.microsoft.com/webdev/2017/08/14/announcing-asp-net-core-2-0/)
-- [Announcing Entity Framework Core 2.0](https://blogs.msdn.microsoft.com/dotnet/2017/08/14/announcing-entity-framework-core-2-0/)
 - [New for Visual Basic: .NET Standard Class Libraries and the dotnet CLI!](https://blogs.msdn.microsoft.com/vbteam/2017/08/14/new-for-visual-basic-net-standard-class-libraries-and-the-dotnet-cli/)
-- [Visual Studio 2017 Version 15.3 Released](https://blogs.msdn.microsoft.com/visualstudio/2017/08/14/visual-studio-2017-version-15-3-released/)
 - [Introducing .NET Standard](https://blogs.msdn.microsoft.com/dotnet/2016/09/26/introducing-net-standard/)
 - [Visual Studio for Mac: now generally available](https://blogs.msdn.microsoft.com/visualstudio/2017/05/10/visual-studio-for-mac-now-generally-available/)
 - [Announcing Visual Studio 2017 General Availability](https://blogs.msdn.microsoft.com/visualstudio/2017/03/07/announcing-visual-studio-2017-general-availability-and-more/)
 - [What's new for .NET Core and Visual Studio 2017 (video)](https://channel9.msdn.com/events/Visual-Studio/Visual-Studio-2017-Launch/T108)
-- [Announcing the .NET Framework 4.7](https://blogs.msdn.microsoft.com/dotnet/2017/04/05/announcing-the-net-framework-4-7/)
-- [New Features in C# 7.0](https://blogs.msdn.microsoft.com/dotnet/2017/03/09/new-features-in-c-7-0/)
 - [Announcing F# 4.1 and the Visual F# Tools for Visual Studio 2017](https://blogs.msdn.microsoft.com/dotnet/2017/03/07/announcing-f-4-1-and-the-visual-f-tools-for-visual-studio-2017-2/)
-- [Open Source Xamarin, Ready for you!](https://blog.xamarin.com/live-from-evolve-open-source-xamarin-ready-for-you/)
-- [The week in .NET](https://blogs.msdn.microsoft.com/dotnet/tag/week-in-net/)
-- [Build 2017 on Channel 9 - Video on Microsoft's latest technologies and news!](https://channel9.msdn.com/?wt.mc_id=build_hp#programGuide)
 
 ## Documentation
 
@@ -51,7 +48,7 @@ Additionally, you can browse the [.NET API reference](/dotnet/api).
 
 ## Open source
 
-This documentation is completely [open source](https://github.com/dotnet/docs). You can contribute in any way you like, from creating issues to writing documentation.  Additionally, much of .NET itself is open source:
+This documentation is completely [open source](https://github.com/dotnet/docs). You can contribute in any way you like, from creating issues to writing documentation.  Additionally, much of .NET itself is also open source:
 
 - [.NET Core Home](https://github.com/dotnet/core)
 - [.NET Libraries](https://github.com/dotnet/corefx)