Binding Ports

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You can redirect compile-time binding references to. NET Framework assemblies, third-party assemblies, or your own app's assemblies. You can redirect your app to use a different version of an assembly in a number of ways: This article discusses how assembly forwarding and bindings works in the.

NET Framework and how it can be configured. NET Framework assemblies are sometimes redirected through a process called assembly unification. NET Framework consists of a version of the common language runtime and about two dozen. NET Framework assemblies that make up the type library. NET Framework assemblies are forwarding and bindings by the runtime as a single unit.

By default, when an app is launched, all references to types in code run by the runtime are directed to. NET Framework forwarding and bindings that have the same version number as the runtime that is loaded in a process. The redirections that occur forwarding and bindings this model are the default behavior for the runtime. For example, forwarding and bindings your app references types in the System.

XML namespace and was built by using the. XML assembly that ships with runtime version 4. If you want to redirect the binding reference to point to the System.

XML assembly that ship with the. NET Framework 4, you can put redirect information in the app configuration file. A binding redirection in a configuration file for a unified. NET Framework assembly cancels the unification for that forwarding and bindings. In addition, you forwarding and bindings want to manually redirect assembly binding for third-party assemblies if there are multiple versions available.

Vendors of assemblies can direct apps to a newer version of an assembly by including a publisher policy file with the new assembly. The forwarding and bindings policy file, which is located in the global assembly cache, contains assembly redirection settings.

For example, redirections from version 2. However, a redirection from version 3. Each major version of the. NET Framework has its own publisher policy file. If a publisher forwarding and bindings file exists for an assembly, the runtime checks this file after checking the assembly's manifest and app configuration file. Vendors should use publisher policy files only when the new assembly is backward compatible with the assembly being redirected.

You can bypass publisher policy for your app by specifying settings in the app configuration file, as discussed in the Bypassing publisher policy section. There are a few different techniques for changing the binding behavior for your app through the app configuration file: You can manually edit the app configuration file to resolve assembly issues. For example, if forwarding and bindings vendor might release a newer version of an assembly that your app uses without supplying a publisher policy, because they do not guarantee backward compatibility, you can direct forwarding and bindings app to use the newer version of the assembly by putting assembly forwarding and bindings information in your app's configuration file as follows.

Starting with Visual Studionew desktop apps that target the. This means that if two components reference different versions of the same strong-named assembly, the runtime automatically adds a binding redirection to the newer version of the assembly in the output app configuration app.

This redirection overrides the assembly unification that might otherwise take place. For example, let's say that your app directly references an out-of-band. NET Framework component but uses a third-party library that targets an older version of the same component.

When you compile the app, the forwarding and bindings app configuration file is modified to contain a binding redirection to the newer version of the component. If you create a web app, you receive a build warning regarding the binding conflict, which in turn, gives you the option to add the necessary binding redirect to the source web configuration file.

If you manually add binding redirects to the source app. For example, let's say you insert the following binding redirect for an assembly:. If another project in your app references version 1. You can enable automatic binding redirection if your app targets older versions of the. You can override this default behavior by providing binding redirection information in the app. For information about how to turn this feature on or off, see How to: Enable and Disable Automatic Binding Redirection.

You can override publisher policy in the app configuration file if necessary. For example, new forwarding and bindings of assemblies that claim to be backward compatible can still break an app.

Bypass publisher policy to keep your app running for your users, but make sure you report the problem to the assembly vendor. If an assembly has a publisher policy file, the vendor should make sure that the assembly is backward compatible and that clients can use the new version as much as possible.

There might be rare cases when a machine administrator wants all apps on a computer to use a specific version of an assembly. For example, the administrator might want every app to use a particular assembly version, because that version fixes a security hole.

If an assembly is redirected in the machine's configuration file, all apps on that machine that use the old version will be directed to use the new version. The machine configuration file overrides the app configuration file and the publisher policy file. The im ersten teil dieser serie wie trade ich binare optionen richtig attribute can specify a single assembly version or a range of versions.

The newVersion attribute should specify a single version. The following code example demonstrates a variety of binding redirect scenarios. The example specifies a redirect for a range of versions for myAssemblyand a single binding redirect for mySecondAssembly. The example also specifies that publisher policy file will not override the binding redirects for myThirdAssembly.

To bind an assembly, you must specify the string "urn: This optional attribute uses a. NET Framework version number to forwarding and bindings what version it applies to. For example, to redirect assembly binding for a.

You should enter redirection information in version forwarding and bindings. For example, enter assembly binding redirection information for. Finally, enter assembly binding redirection information for any. NET Framework assembly redirection that does not use the appliesTo attribute and therefore applies forwarding and bindings all versions of the.

If there is a conflict in redirection, the first matching redirection statement in the configuration file is used. For example, to redirect one reference to a. NET Framework 4 assembly, use the pattern shown in the following pseudocode. Create a Publisher Policy. The feedback system for this content will be changing soon. Old comments will not be carried over. If content within a comment forwarding and bindings is important to you, please save a copy.

For more information on the upcoming change, we invite you to read our blog post. Assembly unification and default binding Bindings to. Redirecting assembly versions by using publisher policy Vendors of assemblies can direct apps to a newer version of an assembly by including a publisher policy file with the new assembly.

Redirecting assembly versions at the app level There are a few different techniques for changing the binding behavior for your app through the app configuration file: Manually editing the app config file You can manually edit the app configuration file to resolve assembly issues.

For example, let's say you insert the following binding redirect for an assembly: Bypassing publisher policy You can override publisher policy in the app configuration file if necessary. Redirecting assembly versions at the machine level There might be rare cases when a machine administrator wants all apps on a computer to use a specific version of an assembly.

NET Framework version 3. NET Framework version 4. Create a Publisher Policy Note The feedback system for this content will be changing soon.

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