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Where are shared assemblies stored?

Posted By :Narayanan     Posted Date :October 09, 2011    Points :40   Category :.NET Framework 
Global assembly cache.

You can also find related Interview Question to Where are shared assemblies stored?  below: 

Where are shared assemblies stored in .NET?

Shared Assemblies are stored in Global Assembly Cache also known as GAC. (More...)

where Shared Assemblies stored?

The shared assemblies are stored in Global assembly cache. (More...)

What are private assemblies and shared assemblies?

A private assembly is used only by a single application, and is stored in that application's install directory (or a subdirectory therein). A shared assembly is one that can be referenced by more than one application. In order to share an assembly, the assembly must be explicitly built for this purpose by giving it a cryptographically strong name (referred to as a shared name). By contrast, a private assembly name need only be unique within the application that uses it.
By making a distinction between private and shared assemblies, we introduce the notion of sharing as an explicit decision. Simply by deploying private assemblies to an application directory, you can guarantee that that application will run only with the bits it was built and deployed with. References to private assemblies will only be resolved locally to the private application directory.
There are several reasons you may elect to build and use shared assemblies, such as the ability to express version policy. The fact that shared assemblies have a cryptographically strong name means that only the author of the assembly has the key to produce a new version of that assembly. Thus, if you make a policy statement that says you want to accept a new version of an assembly, you can have some confidence that version updates will be controlled and verified by the author. Otherwise, you don't have to accept them.
For locally installed applications, a shared assembly is typically explicitly installed into the global assembly cache (a local cache of assemblies maintained by the .NET Framework). Key to the version management features of the .NET Framework is that downloaded code does not affect the execution of locally installed applications. Downloaded code is put in a special download cache and is not globally available on the machine even if some of the downloaded components are built as shared assemblies.
The classes that ship with the .NET Framework are all built as shared assemblies. (More...)

What is Public or shared assemblies ?

These are static assemblies that must have a unique shared name and can be used by any application.
An application uses a private assembly by referring to the assembly using a static path or through an XML-based application configuration file. While the CLR doesn't enforce versioning policies-checking whether the correct version is used-for private assemblies, it ensures that an
application uses the correct shared assemblies with which the application was built. Thus, an application uses a specific shared assembly by referring to the specific shared assembly, and the CLR ensures that the correct version is loaded at runtime.

What are private and shared assemblies?

A private assembly resides within the directory of the application, it can be used only by the application.
A shared assebly is stored in the global assebly cache (GAC), which is the repository of asseblies maintained at runtime, a shared assembly can be referenced by more than one application. (More...)

Can you have two assemblies with the same name in GAC?

Yes you can have two or more assemblies having same name in GAC only when assemblies version no is different.As we know that all assemblies in .NET is having version no. (More...)

What is Satellite Assemblies in .NET?

Assemblies which contains culture information are known as satellite assemblies. Satellite assembly is used to get language specific resources for an application. (More...)

If I want to build a shared assembly, does that require the overhead of signing and managing key pairs?

Building a shared assembly does involve working with cryptographic keys. Only the public key is strictly needed when the assembly is being built. Compilers targeting the .NET Framework provide command line options (or use custom attributes) for supplying the public key when building the assembly. It is common to keep a copy of a common public key in a source database and point build scripts to this key. Before the assembly is shipped, the assembly must be fully signed with the corresponding private key. This is done using an SDK tool called SN.exe (Strong Name).
Strong name signing does not involve certificates like Authenticode does. There are no third party organizations involved, no fees to pay, and no certificate chains. In addition, the overhead for verifying a strong name is much less than it is for Authenticode. However, strong names do not make any statements about trusting a particular publisher. Strong names allow you to ensure that the contents of a given assembly haven't been tampered with, and that the assembly loaded on your behalf at run time comes from the same publisher as the one you developed against. But it makes no statement about whether you can trust the identity of that publisher. (More...)

How can I see what assemblies are installed in the global assembly cache?

The .NET Framework ships with a Windows shell extension for viewing the assembly cache. Navigating to % windir%\assembly with the Windows Explorer activates the viewer. (More...)

What is a Stored Procedure?

Its nothing but a set of T-SQL statements combined to perform a single task of several tasks. Its basically like a Macro so when you invoke the Stored procedure, you actually run a set of statements. (More...)

Where are the ASP.NET configuration files stored?

System-wide configuration settings and some ASP.NET schema settings are stored in a file named Machine.config, which is located in the

%SystemRoot%\Microsoft .NET\Framework\versionNumber\CONFIG directory.

This directory also contains other default settings for ASP.NET Web applications in a file that is referred to as the root Web.config file. ASP.NET configuration files for individual Web sites and applications, which are also named Web.config files, can be stored in any Web site root directory, application root directory, application subdirectory, or all of these. For more information, see ASP.NET Configuration File Hierarchy. (More...)

Where is version information stored of an assembly ?

Version information is stored in assembly in manifest. (More...)

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