Understanding References

The Base Class Library exposes types through several assemblies that are part of the .NET Framework, and you will often need to invoke types from those assemblies. Moreover, although very rich, the BCL cannot define types covering every aspect of application development. This means that you will often need to use types exposed by other assemblies, such as other projects in the same solution or external compiled assemblies.

Note

Each time you create a new project, Visual Studio automatically adds references to some .NET assemblies that are necessary for each kind of application and that expose the BCL’s core part, such as System.dll and System.Core.dll.

To use types defined in external assemblies, you need to add a ...

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