In .NET there are basically three different types of assemblies as follows.

1.Private assemblies:-A private assembly is normally used by a single application and is stored in the application's directory.

2.Public/shared assemblies:- A shared assembly is normally stored in the global assembly cache which is a repository of assemblies maintained by the .NET runtime.

3.satellite assemblies:-Satellite assemblies are often used to deploy language-specific resources for an application. These language-specific assemblies work in side-by-side execution because the application has a separate product ID for each language and installs satellite assemblies in a language-specific subdirectory for each language.

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Private & shared assemblies. We can register Shared assembly through gacutil than we can user in any projects. But In private assembly we have to add Individually for every project.

Private & shared assemblies. We can register Shared assembly through gacutil than we can user in any projects. But In private assembly we have to add Individually for every project.