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Compiler Error C3279

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partial and explicit specializations as well as explicit instantiations of class templates declared in the cli namespace are disallowed

The cli namespace is defined by Microsoft and contains pseudo-templates. The Microsoft C++ compiler does not allow user-defined, partial and explicit specializations, and explicit instantiations of class templates in this namespace.

The following sample generates C3279:

// C3279.cpp
// compile with: /clr
namespace cli {
   template <> ref class array<int> {};   // C3279
   template <typename T> ref class array<T, 2> {};   // C3279
}