Why does C and C++ still exist?

Why does MS keeps maintaining such a language that caused so many buffer overflows, and generally was not as secure as C# or Vb.NET?
The only + point for C++ is that it compiles into machine code directly, and if we can get C# to do that, then there is no need for a language like C++.
I was wondering why C++ still exists when C# is that good of a language.
MS, why not retire C++, and just focus on C# and Vb.NET and F#?
Expand C# capabilities, and get rid of P/invoke and replace it with a new kind of mechanism to call dlls outside the .NET framework.
Finally, make the .NET framework really .NET, in the sense that it is distributed in terms of processing power, by enabling sharing. So that my application could use the processor that is Idle in a second room in the the house, automatically through the use of Remoting in LAN.
Kill C++, and lets all be on one page, with C#.
Its confusing many people, and things needs to be simpler, with few languages. C# for experts, VB.NET for beginners and intermediates.

That is all.

>>19
Without entering a heated debate, I will say this. Imagine that the universe is a giant list; that is, the cons of the cons of the cons ... (repeat ad infinitum.) Now consider this: my existense is the equivalent of the car operator on this infinite list.

>>20
You are kidding arent you ? That sounds preposterous to me. I think you need to re-examine your assumptions.