What is Place of Managed C++ in .NET?

[Alper AKCAYOZ]

Hello Esteemed Developers and Experts,

I have been using Microsoft Visual C++ .NET for 1 year. During this time,
I have searhed some topics over internets. Most of the topics about .NET is
related to C# and Visual Basic .NET. There are less documents about Visual
C++ .NET or Managed C++.

I wonder the reasons of below questions:
1) Is C# more powerful than Managed C++ and Visual C++ .NET?
2) Is Microsoft intending to support C# and V.B. .NET more than Managed
C++?
3) Can C# take the place of standard C++ in terms of performance?
4) What kind of advantages C# have compare to Managed C++ and Visual C++
..NET?

I thank your kind responses and guidances in advance.

Best Regards
--
~~~~~~~~~~~~~~~ ~~~~
İyi Çalışmalar
Alper AKÇAYÖZ (Bil Muh)

Wish You Good Work
Alper AKCAYOZ (Bil Muh)

[Olaf Baeyens]

> >> > Even 50 doesn't sound extraordinarily high. I've always heard that

> the transition was a limiting runtime factor, but that sounds like the > equivalent of calling a tiny subroutine.
>
> Strange thing though, I've worked with code that didn't transition
> smoothly when translated to VC++ with a managed wrapper/bridge.
> I had assumed that it was the transition cycles. I guess I should
> look elsewhere.

50 cycles inside a tight loop can get nasty fast. Also, this is just the transition and does not include marshalling.
But in this case, you create a mixed managed/unmanaged C++ assembly that
does this thing in unmanaged C++ and then comes back to managed C++. This way only one transition.

Keep in mind that any variables declared in one "section" and used in the
other will have to be marshalled. If they're blittable types, it'll be

fast, but it's still added cycles.

#pragma unmanaged <-- transition

char * hello = "Whatever\0 ";

#pragma managed <-- transition

hello++; <-- marshalling

I don't know about that part.
I only use memory blocks for the fast processing (image buffers) using the
fixed keyword to pin down any memory and get the pointers to the data.
I do use strings, so these also slow down, but these strings ar small
compared to the real processing stuff.