All the functions of the Repair Tool can be automated by running the tool in Quiet or Passive mode. This has the benefit of requiring no user interaction for the tool to run. This is especially helpful in large deployments in which system administrators can configure the tool through the command line and also collect logs in specified locations.
NET Framework Repair Tool collects information about tool usage in addition to collecting diagnostic installation data. The usage information is used to improve the quality of the. NET Framework setup. This information is not used for marketing or sold to third parties.
For more information, read the Microsoft. For more information about how to download Microsoft support files, see the following article in the Microsoft Knowledge Base:. Microsoft scanned this file for viruses. Microsoft used the most current virus-detection software that was available on the date that the file was posted. The file is stored on security-enhanced servers that help prevent any unauthorized changes to the file. Note The data collection feature creates a compressed cab file of the.
NET Framework installation logs. After the tool processes the logs, a. When you click Finish in the wizard, the tool sends the. Supported Languages: English United States Quiet mode and Passive mode support through command line is added for the tool.
Now, the tool does not require you to run in UI mode only. Therefore, the task can be automated. The tool now supports the. Therefore, fixing and repairing are also applicable for these products. A new, optional command line switch is added to enable the repair of specific. NET Framework versions to override the repair of other installed versions at the same time. The Repair Tool-generated log file can now be optionally saved in a user-specified location by using a command line option.
A new option lets you run the Repair Tool in Log Collection Only mode without applying any fixes or repairs. The option provides the flexibility to collect and investigate logs before you apply actual fixes. New, optional support is added to let you opt out of any data collection in Quiet or Passive mode. Release: v1. Release v1. NET Framework 4 and its updates. You can use the. Need more help? Check out the announcement blog post.
Runtime Do you want to run apps? Advanced downloads Advanced downloads for. Run apps - Runtime Tooltip: Do you want to run apps? Web installer Tooltip: Downloads all required files, including localized resources, while the installer runs. An Internet connection is required during installation.
No Internet connection is required after you have downloaded the installer. Developer pack Runtime Language packs Tooltip: Adds translated error messages and other UI text to an existing installation.
Md5 and HashAlgorithm. Sha only. Sha , HashAlgorithm. Sha , and HashAlgorithm. Sha are also supported. For more information, see the "SHA-2 support for Message. HashAlgorithm" section in the. NET and Configuration features blog post. NET processes requests in a predefined pipeline that includes 23 events. NET executes each event handler as an execution step.
In versions of ASP. NET up to. NET can't flow the execution context due to switching between native and managed threads. Instead, ASP. NET selectively flows only the HttpContext. This feature is targeted at libraries concerned with tracing, profiling, diagnostics, or transactions, for example, that care about the execution flow of the application.
For more information, see the "ASP. TryParse , that provides a standardized way to create an HttpCookie object from a string and accurately assign cookie values such as expiration date and path. For more information, see "ASP. NET HttpCookie parsing" in the. SHA1 remains the default, and a non-default hash algorithm can be defined in the web configuration file.
For a list of new APIs added to. For a list of feature improvements and bug fixes in. For more information, see Announcing. NET blog. An ExportParameters Boolean method was also added for exporting the key using explicit curve parameters. You can see an example of. This behavior is enabled by default for applications that target.
For more information, see the Application compatibility section. The TLS stack, which is used by System. Developers need no longer hard-code a TLS version.
NET implementations for in-memory object caching and memory monitoring. Developers can now replace any of the following three components if the ASP. NET implementation is not adequate:. Object Cache Store. By using the new cache providers configuration section, developers can plug in new implementations of an object cache for an ASP. Memory monitoring. The default memory monitor in ASP. NET notifies applications when they are running close to the configured private bytes limit for the process, or when the machine is low on total available physical RAM.
When these limits are near, notifications are fired. For some applications, notifications are fired too close to the configured limits to allow for useful reactions. Developers can now write their own memory monitors to replace the default by using the ApplicationMonitors.
MemoryMonitor property. Memory Limit Reactions. By default, ASP. NET attempts to trim the object cache and periodically call GC. Collect when the private byte process limit is near. For some applications, the frequency of calls to GC. Collect or the amount of cache that is trimmed are inefficient.
Developers can now replace or supplement the default behavior by subscribing IObserver implementations to the application's memory monitor. Ability to configure the default message security settings to TLS 1. This is an opt-in setting; to enable it, you must add the following entry to your application configuration file:.
WCF includes a number of code changes that eliminate race conditions, thereby improving performance and the reliability of serialization options. Starting with applications that target. Dynamic DPI changes the layout and appearance of forms and controls when the user changes the DPI or display scale factor of a running application.
This is an opt-in feature in. For the impact of this change on application compatibility, see the Application compatibility section. Data annotation validators enable you to perform validation by adding one or more attributes to a class property. The attribute's ValidationAttribute. ErrorMessage element defines the text of the error message if validation fails. NET makes it easy to localize error messages. Error messages will be localized if:. The ValidationAttribute. ErrorMessage is provided in the validation attribute.
The name of the localized resources file has the form DataAnnotation. The key name of the resource is the string assigned to the ValidationAttribute.
ErrorMessage attribute, and its value is the localized error message. For example, the following data annotation attribute defines the default culture's error message for an invalid rating.
You can then create a resource file, DataAnnotation. The file must be found in the App. LocalResources folder. For example, the following is the key and its value in a localized French fr language error message:.
In addition, data annotation localization is extensible. Developers can plug in their own string localizer provider by implementing the IStringLocalizerProvider interface to store localization string somewhere other than in a resource file. NET now allows task-returning methods to be used with session-state store providers, thereby allowing ASP. NET apps to get the scalability benefits of async. To support asynchronous operations with session state store providers, ASP. NET includes a new interface, System.
ISessionStateModule , which inherits from IHttpModule and allows developers to implement their own session-state module and async session store providers. The interface is defined as follows:. Providers that implement these methods reduce thread-blocking on a web server and improve the scalability of an ASP. NET service. OutputCacheProviderAsync class, which inherits from System. OutputCacheProvider and allows developers to implement an asynchronous output-cache provider. The OutputCacheUtility class, which provides helper methods for configuring the output cache.
HttpCachePolicy class. In the System. Characters in. Support for Unicode 8. 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.
For changes in character categories from Unicode 6. For changes from Unicode 7. In addition to supporting the larger key sizes of FIPS ,. FIPS support is provided by the new System.
DSACng class. In keeping with recent changes to the RSA class in. NET Framework 3. The inputs to the routines, and the routines themselves, were configured via properties on the ECDiffieHellmanCng object. But since not every routine read every input property, there was ample room for confusion on the past of the developer.
To address this in. The Windows cryptography library CNG added support for storing persisted symmetric keys and using hardware-stored symmetric keys, and. Since the notion of key names and key providers is implementation-specific, using this feature requires utilizing the constructor of the concrete implementation types instead of the preferred factory approach such as calling Aes.
Any programs that have registered a custom SignatureDescription handler into CryptoConfig to add support for these algorithms will continue to function as they did in the past, but since there are now platform defaults, the CryptoConfig registration is no longer necessary.
SqlClient includes the following new features in. When connection pooling is enabled and a timeout or other login error occurs, an exception is cached, and the cached exception is thrown on any subsequent connection attempt for the next 5 seconds to 1 minute. This behavior is not desirable when connecting to Azure SQL Databases, since connection attempts can fail with transient errors that are typically recovered quickly.
To better optimize the connection retry experience, the connection pool blocking period behavior is removed when connections to Azure SQL Databases fail. The addition of the new PoolBlockingPeriod keyword lets you select the blocking period best suited for your app.
Values include:. The connection pool blocking period for an application that connects to an Azure SQL Database is disabled, and the connection pool blocking period for an application that connects to any other SQL Server instance is enabled. This is the default value. To improve performance of parameterized queries against encrypted database columns, encryption metadata for query parameters is now cached. With the SqlConnection. ColumnEncryptionQueryMetadataCacheEnabled property set to true which is the default value , if the same query is called multiple times, the client retrieves parameter metadata from the server only once.
Column encryption key entries in the key cache are now evicted after a configurable time interval, set using the SqlConnection. ColumnEncryptionKeyCacheTtl property. When an application targets. For applications that target. Better support for multiple daylight saving time adjustment rules by the DataContractJsonSerializer class. Customers can use an application configuration setting to determine whether the DataContractJsonSerializer class supports multiple adjustment rules for a single time zone.
This is an opt-in feature. To enable it, add the following setting to your app. TimeZoneInfo supports multiple adjustment rules, which makes it possible to work with historic time zone data; TimeZone does not. WCF has a new app setting that can be set on client applications to ensure they always connect to the service listening on the URI that best matches the one that they request. With this app setting set to false the default , it is possible for clients using NetNamedPipeBinding to attempt to connect to a service listening on a URI that is a substring of the requested URI.
For example, a client tries to connect to a service listening at net. With this app setting set to false , the client would attempt to connect to the wrong service. After setting the app setting to true , the client will always connect to the best matching service.
Clients using NetNamedPipeBinding find services based on the service's base address if it exists rather than the full endpoint address. To ensure this setting always works the service should use a unique base address. To enable this change, add the following app setting to your client application's App.
In most cases, there should be no impact to existing apps, because TLS 1. All existing clients should be able to negotiate a connection using at least TLS 1.
If Ssl3 is required, use one of the following configuration mechanisms to add it to the list of negotiated protocols. SslProtocols property. The TcpTransportSecurity. An application that uses a CollectionView object to group data can now explicitly declare how to sort the groups. Explicit sorting addresses the problem of non-intuitive ordering that occurs when an app dynamically adds or removes groups, or when it changes the value of item properties involved in grouping.
It can also improve the performance of the group creation process by moving comparisons of the grouping properties from the sort of the full collection to the sort of the groups. To support group sorting, the new GroupDescription. SortDescriptions and GroupDescription. CustomSort properties describe how to sort the collection of groups produced by the GroupDescription object. This is analogous to the way the identically named ListCollectionView properties describe how to sort the data items.
For example, the following XAML groups data by age, sort the age groups in ascending order, and group the items within each age group by last name. Touch keyboard support enables focus tracking in WPF applications by automatically invoking and dismissing the touch Keyboard in Windows 10 when the touch input is received by a control that can take textual input. In other words, the application's UI is scaled by the OS as appropriate, depending on the DPI of the monitor on which the app is rendered.
For apps running under. For more information, see the Windows Workflow Foundation blog. Availability of IntelliSense when a customer rebuilds a workflow project from Visual Studio In versions of the. NET Framework prior to 4. While the project build is successful, the workflow types are not found on the designer, and warnings from IntelliSense for the missing workflow types appear in the Error List window.
To enable this scenario, you must make the following change to your app. If this scenario is not enabled, running the application continues to generate an exception with the message, "This implementation is not part of the Windows Platform FIPS validated cryptographic algorithms. PrepareForUpdate method. In versions of the. NET Framework before. PrepareForUpdate can result in the following issues:. Id is at the end of the line. Flowchart Activity Designer or other Workflow Activity Designers may display all objects in their default locations as opposed to attached property values.
ClickOnce has been updated to support TLS 1. ClickOnce automatically detects which protocol is required; no extra steps within the ClickOnce application are required to enable TLS 1. 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 app continues to behave as before and runs as a full trust app. Once the app is converted, an app container process can be added to the existing full trust process to add an adaptive user interface.
When all functionality is moved to the app container process, the full trust process can be removed and the new UWP app can be made available to all Windows 10 devices. The unmanaged debugging API has been enhanced in. 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.
Application Compatibility in 4. NET Framework implementation wraps calls into existing Windows functionality. The following example code shows how easy it is to generate a signature for a byte stream by using the new support for ECDSA X certificates included in.
With this support, customers can leverage asymmetric keys stored in HSMs without having to write custom column master key store providers and registering them in applications. It transparently detects whether your application is connecting to an AlwaysOn availability group AG on a different subnet and quickly discovers the current active server and provides a connection to the server.
Without setting the connection keyword to true , an application might experience a timeout while connecting to an AlwaysOn Availability Group. With this release, an application does not need to set MultiSubnetFailover to true anymore.
The delay in firing touch events has been fixed in. In addition, typing in a RichTextBox control no longer ties up the render thread during fast input. The spell checker in WPF has been updated on Windows 8. There is no change in functionality on Windows versions prior to Windows 8. As in previous versions of. This capability is available in addition to the ability to register them per-control.
They are supported on Windows 8. The following rules apply to these files:. The files should have extensions of. Each line should consist of a word in the added and excluded word lists , or an autocorrect pair with the words separated by a vertical bar " " in the AutoCorrect word list. Help us improve our samples by sending us a pull-request or opening a GitHub issue.
The code for this package has been open sourced and is available on GitHub. The Transaction. If this operation is successful, there are limitations placed on the capabilities of the transaction. Once a non-MSDTC transaction promoter is enlisted, it must be used for future durable enlistments by using protocols that it defines. The Guid of the transaction promoter can be obtained by using the PromoterType property.
When the transaction promotes, the transaction promoter provides a Byte array that represents the promoted token. Users of the new Transaction. EnlistPromotableSinglePhase IPromotableSinglePhaseNotification, Guid overload must follow a specific call sequence in order for the promotion operation to complete successfully. These rules are documented in the method's documentation. 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.
Previously such tools could instrument IL at any time, but metadata could only be modified at module load time. Because IL refers to metadata, this limited the kinds of instrumentation that could be done. This change makes a much broader range of on-the-fly instrumentation possible.
Cross-machine event tracing allows customers to profile a program on Machine A and look at the profiling data with source line mapping on Machine B.
Using previous versions of. NET Framework, the user would copy all the modules and native images from the profiled machine to the analysis machine that contains the IL PDB to create the source-to-native mapping. While this process may work well when the files are relatively small, such as for phone applications, the files can be very large on desktop systems and require significant time to copy.
Combining both mappings provides a source-to-native mapping. Since the native image PDB is much smaller than all the modules and native images, the process of copying from Machine A to Machine B is much faster. NET introduces. NET Core. Some new features apply to both, and other features are specific to. NET Core, which is a lean. NET implementation for building modern cloud-based apps. NET Core is modular so you can include only those features that are needed in your application.
It can be hosted on IIS or self-hosted in a custom process, and you can run apps with different versions of the. NET Framework on the same server. It includes a new environment configuration system that is designed for cloud deployment. You build ASP. Your existing applications will work on the new. For information, see ASP. 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.
Async model binding is controlled by the aspnet:EnableAsyncModelBinding configuration setting. On apps the target. On apps running on. NET Framework, it is false by default. It can be enabled by setting the configuration setting to true. NET in. HttpClient API. The browser and the web server IIS on Windows do all the work. You don't have to do any heavy-lifting for your users. Microsoft and Google have been collaborating on a new approach to authentication, called the Token Binding Protocol.
The premise is that authentication tokens in your browser cache can be stolen and used by criminals to access otherwise secure resources for example, your bank account without requiring your password or any other privileged knowledge. The new protocol aims to mitigate this problem. The Token Binding Protocol will be implemented in Windows 10 as a browser feature.
NET apps will participate in the protocol, so that authentication tokens are validated to be legitimate. The client and the server implementations establish the end-to-end protection specified by the protocol. However, it was not supported by ASP. NET features depended on a stable hash code. With Always Encrypted, SQL Server can perform operations on encrypted data, and best of all the encryption key resides with the application inside the customer's trusted environment and not on the server.
Always Encrypted secures customer data so DBAs do not have access to plain text data.
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