Thread: Combining C code with C# for GUI

Hello,
I have been working on this project for about 2 weeks and i'm pretty much ready with the code.It's a program that makes statistical analysis for a group of students and you can choose the operations from the menu below:

Code:

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                    Menu
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1. Add student records
2. Delete student records
3. Update student records
4. View all student records
5. Calculate an average of a selected student’s scores
6. Show student who gets the max total score
7. Show student who gets the min total score
8. Find student by ID
9. Sort records by total scores

Now I want to make a GUI for the program.Since I want to develop some skills in C# i though I would make the GUI in C#.So my question is can I combine the code in C for the main program with a GUI made in C#?
If it's important I can upload the code in C,but only if its necessary,since it will stretch the main post and make it inconvenient.

Thanks for the reply.I decided to rewrite the program in C#.