Combining two audio files in C#

Question

There are 2 audio ( mp3 or wav) files. The first file has the voice of me, the second one has the voice of my friend. Each of them has 10 seconds duration. I want to combine them to get one file that also should have 10 seconds duration.

What are the tools or utilities I should use to solve this issue?

UPDATE: I used lame.exe, but it concatenated them and created the file of 20 seconds duration.

Answer 1

This might do the trick.

My WAVFile class supports 8- and 16-bit audio, mono or stereo. One of its special features is a method that will mix WAV audio files together, so that the audio from each source WAV file will be heard simultaneously.

Note: In the above paragraph, My refers to the author of the class, not to myself.

Answer 2

Check out NAudio tutorial: Mixing multiple wave files together in real time.