Introduction
The Microsoft .NET Framework 4.7.1 is a highly compatible in-place update to the Microsoft .NET Framework 4, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, and 4.7. It is a platform for building and running desktop and web applications on Windows. It supports various programming languages, such as C#, F#, and Visual Basic. It also provides a rich set of libraries and APIs for common tasks, such as data access, networking, cryptography, and user interface. The .NET Framework 4.7.1 was released in October 2017 and is available for download from the Microsoft website.
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Features
The .NET Framework 4.7.1 introduces new features in several areas, such as:
Base classes: The .NET Framework 4.7.1 has built-in support for .NET Standard 2.0, which is a set of APIs that are common across different implementations of .NET . This means that the .NET Framework 4.7.1 can run libraries that target .NET Standard 2.0 without requiring additional files or binding redirects . The .NET Framework 4.7.1 also adds about 200 missing APIs that were part of .NET Standard 2.0 but not implemented by previous versions of the .NET Framework .
Common language runtime (CLR): The CLR is the core component of the .NET Framework that executes managed code and provides services such as memory management, exception handling, security, and interoperability. The CLR in the .NET Framework 4.7.1 includes performance improvements in garbage collection (GC), which is the process of reclaiming memory from unused objects . The GC in the .NET Framework 4.7.1 reduces allocation lock contention and allows large object heap (LOH) allocations while background GC is sweeping small object heap (SOH) . This can improve the allocation performance and responsiveness of applications that make a lot of LOH allocations .
Networking: The networking libraries in the .NET Framework 4.7.1 support HTTP/2 protocol, which is a major revision of HTTP that offers faster and more efficient web communication . The networking libraries also support TLS (Transport Layer Security) protocol version 1.2 by default for secure connections . TLS is a cryptographic protocol that provides privacy and data integrity between two communicating applications. By using TLS 1.2 by default, the networking libraries enhance the security and reliability of web applications that use HTTPS (Hypertext Transfer Protocol Secure) .
ASP.NET: ASP.NET is a framework for building dynamic web applications using .NET technologies. ASP.NET in the .NET Framework 4.7.1 includes several enhancements, such as:
Support for dependency injection (DI) in Web Forms pages and controls . DI is a design pattern that allows a class to receive its dependencies from an external source rather than creating them itself. By using DI in Web Forms, developers can improve the testability, maintainability, and modularity of their code .
Support for same-site cookies, which are cookies that are only sent in requests originating from the same site as the target domain . Same-site cookies can help prevent cross-site request forgery (CSRF) attacks, which are malicious attempts to trick a user into performing an unwanted action on a web application. By using same-site cookies, ASP.NET can enhance the security and privacy of web applications that use cookies for authentication or session management .
Support for configuration builders, which are classes that can modify or generate configuration settings at runtime . Configuration builders can be useful for scenarios such as retrieving configuration settings from a database, a web service, or an environment variable . By using configuration builders, ASP.NET can provide more flexibility and extensibility for web applications that need dynamic configuration .
Benefits
The .NET Framework 4.7.1 offers several benefits for developers and users of desktop and web applications on Windows, such as:
Compatibility: The .NET Framework 4.7.1 is compatible with previous versions of the .NET Framework 4.x family, which means that existing applications that target those versions can run on the .NET Framework 4.7.1 without any changes or recompilation . The .NET Framework 4.7.1 also supports backward compatibility with older versions of Windows, such as Windows 7 and Windows Server 2008 R2 . This means that users of those operating systems can benefit from the new features and improvements in the .NET Framework 4.7.1 without upgrading their OS .
Performance: The .NET Framework 4.7.1 improves the performance of desktop and web applications on Windows by optimizing various aspects of the platform, such as memory management, networking, and user interface . For example, the GC in the .NET Framework 4.7.1 reduces allocation lock contention and allows LOH allocations while background GC is sweeping SOH, which can improve the allocation performance and responsiveness of applications that make a lot of LOH allocations . Another example is the support for HTTP/2 protocol in the networking libraries, which can improve the speed and efficiency of web communication by using features such as multiplexing, header compression, and server push .
Security: The .NET Framework 4.7.1 enhances the security of desktop and web applications on Windows by supporting the latest standards and protocols for secure communication and data protection . For example, the networking libraries in the .NET Framework 4.7.1 support TLS 1.2 by default for secure connections, which can prevent attacks that exploit vulnerabilities in older versions of TLS . Another example is the support for same-site cookies in ASP.NET, which can prevent CSRF attacks that exploit cookies for authentication or session management .
Productivity: The .NET Framework 4.7.1 increases the productivity of developers by providing new features and enhancements that simplify common tasks and enable new scenarios for desktop and web applications on Windows . For example, the built-in support for .NET Standard 2.0 in the base classes allows developers to use libraries that target .NET Standard 2.0 without requiring additional files or binding redirects [^4 ^]. This means that developers can reuse code and libraries across different platforms and frameworks that support .NET Standard 2.0, such as .NET Core, Xamarin, and Unity . Another example is the support for DI in Web Forms pages and controls, which allows developers to inject dependencies into their Web Forms components without using complex techniques such as service locators or factories . This can improve the testability, maintainability, and modularity of their Web Forms code .
System Requirements
The .NET Framework 4.7.1 has the following hardware and software requirements for installation and running on Windows:
Hardware Requirements
Software Requirements
1 GHz or faster processor
512 MB of RAM
4.5 GB of available hard disk space (x86)
4.5 GB of available hard disk space (x64)
Windows 7 SP1 (x86 and x64)
Windows 8.1 (x86 and x64)
Windows 10 Anniversary Update (x86 and x64)
Windows 10 Creators Update (x86 and x64)
Windows Server 2008 R2 SP1 (x64)
Windows Server 2012 (x64)
Windows Server 2012 R2 (x64)
Windows Server 2016 (x64)
Installation Steps
To install the .NET Framework 4.7.1 on Windows, you can follow these steps:
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Download the offline installer or the web installer from the Microsoft website. The offline installer is a standalone package that contains all the components of the .NET Framework 4.7.1 and does not require an internet connection during installation. The web installer is a small package that downloads the required components of the .NET Framework 4.7.1 from the internet during installation.
Run the installer as an administrator and follow the instructions on the screen. You may need to accept the license agreement and restart your computer after the installation is complete.
To verify that the .NET Framework 4.7.1 is installed on your computer, you can use the Registry Editor or the CLR Verifier tool. The Registry Editor is a built-in tool that allows you to view and edit the registry entries on your computer. The CLR Verifier tool is a command-line tool that displays the version of the CLR installed on your computer.
To use the Registry Editor, open it by typing regedit in the Start menu or the Run dialog box. Then, navigate to the following key: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\NET Framework Setup\NDP\v4\Full . If you see a DWORD value named Release with a data value of 461308, it means that the .NET Framework 4.7.1 is installed on your computer.
To use the CLR Verifier tool, download it from the Microsoft website and extract it to a folder on your computer. Then, open a command prompt window and navigate to the folder where you extracted the tool. Type clrver.exe and press Enter. If you see a line that says v4.0.30319, it means that the .NET Framework 4.7.1 is installed on your computer.
Issues and Solutions
.1 by using the Windows Server 2016 or Windows 10 operating systems and the Internet Information Services (IIS) 10 web server. To do this, follow these steps:
Make sure that your web application targets the .NET Framework 4.7.1 and that it uses HTTPS for secure communication.
Make sure that your web server runs on Windows Server 2016 or Windows 10 and that it has IIS 10 installed and configured.
Open the IIS Manager and select your web site in the Connections pane.
Double-click on the SSL Settings feature in the middle pane.
Check the Enable HTTP/2 option in the SSL Settings dialog box.
Click on Apply and restart your web site.
Q: How do I migrate my application from the .NET Framework to .NET Core or Mono?
A: You can migrate your application from the .NET Framework to .NET Core or Mono by using the .NET Portability Analyzer tool. This tool analyzes your application assemblies and generates a report that shows how portable your application is across different .NET platforms, such as .NET Core, Mono, Xamarin, and Unity. It also provides suggestions and links to help you migrate your application to the target platform. You can download the tool from the Microsoft website and run it on your application before or after installing the .NET Framework 4.7.1.
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