Reloading/Restarting Software

Question

I took over a C# project that another programmer developed a while back and he's no longer with us. For a number of reasons, after this program gets to a certain point and is waiting for more commands, I need to kill the process and load it up again. I'm still fairly new to C#, and I was wondering how I would go about closing/re-opening the program automatically. Would I have to make use of a .bat file for this or are there other methods I can use?