Audio Help

Question

Can someone please give me some pointers. I cannot seem to find any answers anywhere on this topic. I am trying to use C# to create an audio recorder to record input from a microphone to a .wma file. The problem comes in that I need to be able to navigate to a position and be able to record into that spot of the file, whether it be to insert the recording or to record over some of the file. What can I use to accomplish this in C#. I have already used Windows Media Encoder SDK to accomplish the recording from the microphone. Is there anything else that will allow me to do this???????????? Please Help???????????? Thanks, Kendal