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In response to the COVID-19 pandemic, the Centers for Medicare & Medicaid Services (CMS) is implementing 2 new procedure codes, in addition to the 7 new procedure codes previously announced, bringing the total to 9 new procedure codes, to describe the introduction or infusion of therapeutics, including vaccines for COVID-19 treatment, into the International Classification of Diseases, Tenth Revision, Procedure Coding System (ICD-10-PCS), effective April 1, 2022.
In response to the ongoing COVID-19 public health emergency, the Centers for Medicare and Medicaid Services (CMS) is implementing 7 new procedure codes to describe the introduction or infusion of therapeutics, including vaccines, into the International Classification of Diseases, Tenth Revision, Procedure Coding System (ICD-10-PCS), effective April 1, 2022.
The 2022 ICD-10 Procedure Coding System (ICD-10-PCS) files below contain information on the ICD-10-PCS updates for FY 2022. These 2022 ICD-10-PCS codes are to be used for discharges occurring from October 1, 2021 through September 30, 2022.
In VS Code Desktop, to be able to create GitHub permalinks and HEAD links from the editor gutter, you need to install the GitHub Pull Requests and Issues extension. In vscode.dev, deep links for GitHub repositories are available out of the box.
GitHub Copilot is an AI pair programmer tool that helps you write code faster and smarter. You can use the Copilot extension in VS Code to generate code, learn from the code it generates, and even configure your editor.
This article does not provide comprehensive information about each new feature and is subject to change. For general information about .NET Framework, see Getting Started. For supported platforms, see System Requirements. For download links and installation instructions, see Installation Guide.
A service's health status can be queried by using query parameters such as OnServiceFailure, OnDispatcherFailure, OnListenerFailure, OnThrottlePercentExceeded), and an HTTP response code can be specified for each query parameter. If the HTTP response code is omitted for a query parameter, a 503 HTTP response code is used by default. For example:
NGEN improvements. The runtime has improved its memory management for Native Image Generator (NGEN) images so that data mapped from NGEN images are not memory-resident. This reduces the surface area available to attacks that attempt to execute arbitrary code by modifying memory that will be executed.
Dependency injection (DI) decouples objects and their dependencies so that an object's code no longer needs to be changed just because a dependency has changed. When developing ASP.NET applications that target .NET Framework 4.7.2, you can:
NET Framework 4.7.2 adds supports for enclave-based Always Encrypted. The original version of Always Encrypted is a client-side encryption technology in which encryption keys never leave the client. In enclave-based Always Encrypted, the client can optionally send the encryption keys to a secure enclave, which is a secure computational entity that can be considered part of SQL Server but that SQL Server code cannot tamper with. To support enclave-based Always Encrypted, .NET Framework 4.7.2 adds the following types and members to the System.Data.SqlClient namespace:
A diagnostic assistant that edits the original markup in MyRD.xaml can use the new feature to locate the dictionary. The feature is implemented by a new static method, ResourceDictionaryDiagnostics.GetResourceDictionariesForSource. The diagnostic assistant calls the new method using an absolute Uri that identifies the original markup, as illustrated by the following code:
The System.Runtime.CompilerServices.RuntimeFeature class provides a mechanism for determine whether a predefined feature is supported on a given .NET implementation at compile time or run time. At compile time, a compiler can check whether a specified field exists to determine whether the feature is supported; if so, it can emit code that takes advantage of that feature. At run time, an application can call the RuntimeFeature.IsSupported method before emitting code at run time. For more information, see Add helper method to describe features supported by the runtime.
The TLS stack, which is used by System.Net.Security.SslStream and up-stack components such as HTTP, FTP, and SMTP, allows developers to use the default TLS protocols supported by the operating system. Developers need no longer hard-code a TLS version.
Characters in .NET Framework 4.6.2 are classified based on the Unicode Standard, Version 8.0.0. In .NET Framework 4.6 and .NET Framework 4.6.1, characters were classified based on Unicode 6.3 character categories.
Support for Unicode 8.0 is limited to the classification of characters by the CharUnicodeInfo class and to types and methods that rely on it. These include the StringInfo class, the overloaded Char.GetUnicodeCategory method, and the character classes recognized by the .NET Framework regular expression engine. Character and string comparison and sorting is unaffected by this change and continues to rely on the underlying operating system or, on Windows 7 systems, on character data provided by .NET Framework.
For changes in character categories from Unicode 6.0 to Unicode 7.0, see The Unicode Standard, Version 7.0.0 at The Unicode Consortium website. For changes from Unicode 7.0 to Unicode 8.0, see The Unicode Standard, Version 8.0.0 at The Unicode Consortium website.
Starting with .NET Framework 4.5, WF supports C# expressions in both the Visual Studio Designer and in code workflows. The Rehosted Workflow Designer is a key feature of WF that allows for the Workflow Designer to be in an application outside Visual Studio (for example, in WPF). Windows Workflow Foundation provides the ability to support C# expressions and IntelliSense in the Rehosted Workflow Designer. For more information, see the Windows Workflow Foundation blog.
Windows now offers capabilities to bring existing Windows desktop apps, including WPF and Windows Forms apps, to the Universal Windows Platform (UWP). This technology acts as a bridge by enabling you to gradually migrate your existing code base to UWP, thereby bringing your app to all Windows 10 devices.
The unmanaged debugging API has been enhanced in .NET Framework 4.6.2 to perform additional analysis when a NullReferenceException is thrown so that it is possible to determine which variable in a single line of source code is null. To support this scenario, the following APIs have been added to the unmanaged debugging API.
The ICorDebugCode4, ICorDebugVariableHome, and ICorDebugVariableHomeEnum interfaces, which expose the native homes of managed variables. This enables debuggers to do some code flow analysis when a NullReferenceException occurs and to work backwards to determine the managed variable that corresponds to the native location that was null.
WPF includes a NuGet package that provides new implementations of D3DImage that make it easy for you to interoperate with DX10 and Dx11 content. The code for this package has been open sourced and is available on GitHub.
In ASP.NET Core, it is becoming much more common for assemblies to be compiled in-memory by Roslyn. For developers making profiling tools, this means that PDBs that historically were serialized on disk may no longer be present. Profiler tools often use PDBs to map code back to source lines for tasks such as code coverage or line-by-line performance analysis. The ICorProfilerInfo7 interface now includes two new methods, ICorProfilerInfo7::GetInMemorySymbolsLength and ICorProfilerInfo7::ReadInMemorySymbols, to provide these profiler tools with access to the in-memory PDB data, By using the new APIs, a profiler can obtain the contents of an in-memory PDB as a byte array and then process it or serialize it to disk.
In .NET Framework 4.5, ASP.NET added the Model Binding feature that enabled an extensible, code-focused approach to CRUD-based data operations in Web Forms pages and user controls. The Model Binding system now supports Task-returning model binding methods. This feature allows Web Forms developers to get the scalability benefits of async with the ease of the data-binding system when using newer versions of ORMs, including the Entity Framework.
.NET Framework 4.5 introduced a randomized string hash algorithm. However, it was not supported by ASP.NET because of some ASP.NET features depended on a stable hash code. In .NET Framework 4.6, randomized string hash algorithms are now supported. To enable this feature, use the aspnet:UseRandomizedStringHashAlgorithm config setting.
.NET Framework 4.6 features a new version of the 64-bit JIT compiler (originally code-named RyuJIT). The new 64-bit compiler provides significant performance improvements over the older 64-bit JIT compiler. The new 64-bit compiler is enabled for 64-bit processes running on top of .NET Framework 4.6. Your app will run in a 64-bit process if it is compiled as 64-bit or AnyCPU and is running on a 64-bit operating system. While care has been taken to make the transition to the new compiler as transparent as possible, changes in behavior are possible.
Enhancements to the RSA API so that common actions no longer require casting. For example, encrypting data using an X509Certificate2 object requires code like the following in previous versions of .NET Framework.
With AppContext, libraries define and expose compatibility switches, while code that depends on them can set those switches to affect the library behavior. By default, libraries provide the new functionality, and they only alter it (that is, they provide the previous functionality) if the switch is set.
.NET Core primarily supports the Unicode encodings and by default provides limited support for code page encodings. You can add support for code page encodings available in .NET Framework but unsupported in .NET Core by registering code page encodings with the Encoding.RegisterProvider method. For more information, see System.Text.CodePagesEncodingProvider. 59ce067264