C#: convert a PDF file to a text file using Acrobat

I am writing a C# application that needs to use Adobe Acrobat DC to open a PDF file and save it as a text file, using Acrobat's file conversion. How do I do this? Can anybody show me some sample code using the SDK? I have already looked through the sample code provided with the SDK but I don't see anything that helps me convert a PDF file to a .txt file.