Active Directory Credential in App.config for c# application?

This is my first time trying to connect an application to an Active Directory. I want to add a user to Active Directory from my C# console application, however I am getting an HResult=0x80070005 Access Denied error which I believe is because I need to pass in the Domain Admin credential. I am not quite sure where that would be added or if someone could point me to a resource to understand how to make this work.