Compiler Error C3350

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'delegate' : a delegate constructor expects number argument(s)

When you create an instance of a delegate, you must pass two arguments, an instance of the type containing the delegate function, and the function.

The following sample generates C3350:

// C3350.cpp
// compile with: /clr
delegate void SumDelegate();

public ref class X {
public:
   void F() {}
   static void F2() {}
};

int main() {
   X ^ MyX = gcnew X();
   SumDelegate ^ pSD = gcnew SumDelegate();   // C3350
   SumDelegate ^ pSD1 = gcnew SumDelegate(MyX, &X::F);
   SumDelegate ^ pSD2 = gcnew SumDelegate(&X::F2);
}

Managed Extensions for C++

The following sample generates C3350:

// C3350b.cpp
// compile with: /clr:oldSyntax
#using <mscorlib.dll>
__delegate void SumDelegate();

public __gc class X {
public:
   void F() {}
   static void F2() {}
};

int main() {
   X * MyX = new X();
   SumDelegate *pSD = new SumDelegate();   // C3350
   SumDelegate *pSD1 = new SumDelegate(MyX, &X::F);
   SumDelegate *pSD2 = new SumDelegate(&X::F2);
}