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Compiler Error C3399

Error Message

'type' : cannot provide arguments when creating an instance of a generic parameter

When you specify the gcnew() constraint, you specify that the constraint type will have a parameterless constructor. Therefore, it is an error to attempt to instantiate that type and pass a parameter.

See Constraints for more information.

Example

The following sample generates C3399.

// C3399.cpp
// compile with: /clr /c
generic <class T> 
where T : gcnew()
void f() {
   T t = gcnew T(1);   // C3399
   T t2 = gcnew T();   // OK
}
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