• C++ can be used to write applications that run on the .NET Framework. There is no need to learn a totally new language or to abandon all the C++ knowledge and experience built up through years of coding.
• C++/CLI lets developers reuse their native C++ code base, saving the agony of having to rewrite all the existing code to enable it to run on the .NET Framework.
• C++/CLI is designed to be the lowest-level language for the .NET Framework. For writing purely managed applications, it’s your most powerful choice; or, as I like to say, "C++/CLI actually lets you smell the CLR (Common Language Runtime)."

IEnumerator* pEnumerator = arraylist->GetEnumerator();
while(pEnumerator->MoveNext())
{
Console::WriteLine(pEnumerator->Current);
}

for each(String^ s in arraylist)
{
Console::WriteLine(s);
}

__gc class R
{
};
class N
{
};

. . .
N* pN = new N();
R* pR = new R(); 

cl /clr First.cpp

1. In the New Project Wizard dialog, choose CLR under Visual C++ in the Project types tree control on the left, and select CLR Console Application from the Templates list control on the right. You can use Figure 1.2 as a reference when doing this.



2. Enter a name for the project, and click OK.

int main(array<System::String ^> ^args)

• A C++/CLI value class (or value struct) is the same as a C# struct.
• A C++/CLI ref class (or ref struct) is the same as a C# class.

• A ref class is the same as an __gc class.
• A value class is the same as an __value class.
• An interface class is the same as an __interface.

int ref = 0;
int value = ref;
bool each = value == ref;

ref class R2 abstract
{
public:
    virtual void Func(){}
};

ref class R1
{
public:
    virtual void Func() abstract;
};

ref class S sealed
{
};

ref class D : S // This won't compile
{               // Error C3246
};

ref class SA abstract sealed
{
public:
       static void DoStuff(){}
private:
       static int bNumber = 0;
};

ref class Base
{
};

ref class Derived : Base // implicitly public
{
};

interface class IBase
{
};

ref class Derived1 : private IBase {}; //error C3141
ref class Derived2 : protected IBase {}; //error C3141
ref class Derived3 : IBase {}; //public assumed

ref class RefBase {};
value class ValBase {};
interface class IBase {};

value class Derived1 : RefBase {}; //error C3830
value class Derived2 : ValBase {}; //error C3830
value class Derived3 : IBase {};