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copied!<p>You may not have to convert the code. </p> <p>link.exe, part of the C++ compiler tools, is able to include both C++ and C# code in the same assembly. The C++ bit can include a mixture of managed and unmanaged code. You first have to compile the C# code to a .netmodule with command line switches of the C# compiler (csc.exe), and then you can use link.exe to compile it into an assembly with C++ code. It's been a while since I've created a mixed language assembly so apologies if the details are not 100%, but search for the above terms and you will find a way to do it.</p> <p>I seem to remember that the key part is remembering that the C++ compiler is more advanced than the others and so can consume C#/VB netmodules, but not the other way round. I found that the advantage of compiling into a single assembly rather than one referencing another is that types inside each part of the single assembly can cross-reference each other. By having references between two separate assemblies the type awareness relationship has to be hierarchical.</p> <p>There is also the <a href="http://msdn.microsoft.com/en-us/library/chfa2zb8%28v=vs.100%29.aspx" rel="nofollow">unsafe</a> keyword in C#, which allows C++-ish style pointers to be used within sections of a C# code file, and turns off array bounds checking. There are disadvantages of this that may or may not matter depending on your usage scenario.</p> <p>Personally I found that running some calculation-intensive code was 20x quicker in the C++ compiler compared to C#, after I had optimised it using the pointers available in C++, which was worth the effort in my case.</p>

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