One of the more important problems is that when your programs rely on assemblies being registered in the GAC, they become more difficult to deploy. The use of the global assembly cache for storing your shared assemblies has some drawbacks. When an assembly is requested, the common language runtime (CLR) will ensure that the correct version is loaded. To avoid the historical problems of DLL Hell, the GAC can hold multiple versions of the same assembly.
Once an assembly is added to the GAC, it is available to all applications that wish to use it. The GAC is a machine-wide repository for shared assemblies. The Global Assembly Cache, or GAC, provides a solution to the problem of duplicated DLLs. If the shared classes are updated to fix bugs or to implement new features, the DLL may need to be deployed to multiple locations to ensure that every program is using the latest revision. The downside to this approach is that each program deployed includes its own copy of the DLL. The entire output folder can then be simply copied to the end-user's computer and executed, as all of the required assemblies are available. On building the solution, the DLL will therefore be saved into the folder containing the compiled program. This DLL can then be referenced from within many other class libraries or software applications.īy default, when you add a reference to a DLL to your project, the reference's "Copy Local" property is set to true. To maximise the potential for reuse, you will generally isolate a class library within an assembly, or a group of related assemblies, and package it into a dynamic linked library, or DLL. The principle of code reuse, to minimise the processes of duplicating code between software applications, often leads to the creation of shared class libraries.
When you add an assembly to the GAC, you allow it to be shared by many programs, rather than requiring a copy to be installed for each application. The global assembly cache (GAC) provides a centralised, machine-wide storage location for.
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