One of the new key features for Microsoft Dynamics NAV 2009 R2 is the interoperability extension with the .NET Framework, also called the DotNet interop feature. This feature allows the AL code to call out to .NET types and use the exposed methods and properties. The types can be system types installed with the .NET Framework, or other applications that register assemblies in the Global Assembly Cache (GAC), or it can be custom assemblies that are stored in subfolders relative to the Microsoft Dynamics NAV server or client.
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