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What is the advantage of 'Integrate C project into C# project' vs 'Import DLL into C# project'

Hi experts
I have a C# project that needs to call a method (already) implemented in a C project.

There're two possibilities I could think of.
1. Integrate the C project into the C# project.
2. Build the C project into a DLL, and the C# project imports the DLL.

But I understood approach #1 is also effectively turning the integrated C project into a DLL.
It seems to me there is no benefit from approach #1. Is my understanding correct? Thanks.
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dominicwong
Asked:
dominicwong
2 Solutions
 
Rikin ShahMicrosoft Dynamics CRM ConsultantCommented:
Yes, approach  #1 will similarly do the same thing. If you are not going to change the code in C Project then I would recommend you import the DLL only.
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QuinnDexCommented:
you will have to write a dll to integrate your C/C++ code with .NET either way how you do it effects how you can use the c code in your c# app.

You can either write a normal C dll and call it through interop like any other C dll in C#. This is somewhat ugly on the C# side of the program, but you could use the same dll from your C programs.

 Somewhat nicer from a .NET point of view is writing a managed wrapper, also called a mixed mode dll. C++/CLI compiles to a normal .NET assembly, that looks, behaves and works the same as any dll written in C#.

 In C++/CLI you can include unmanaged code. Most of the time this is used to bring legacy C code into a new .NET application
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dominicwongAuthor Commented:
Thanks rikin_shah and QuinnDex.

Would you have any idea to my other DLL related question please:
http://www.experts-exchange.com/Programming/Languages/.NET/Q_28297745.html
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