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Compiler Error C3869

gcnew constraint is missing empty parameter list '()'

The gcnew special constraint was specified without the empty parameter list. See Constraints for more information.

The following sample generates C3869.

// C3869.cpp
// compile with: /c /clr
using namespace System;
generic <typename T>
where T : gcnew   // C3869
// try the following line instead
// where T : gcnew()
ref class List {};