String manipulation c#

I need a small application on Windows forms written in c# which will change/remove specific strings in a text file. The application will be used on Windows 10 The extensions of the files to be manipulated are: .tap, .nc, .txt I would prefer the file to be dropped in a box rather than to have to select the file. I would like to have 2 textboxes side to side scrolling in parallel showing on the original file the changes that will be done to the file. Changes to be made to the file All values “A0.0200” to be changed to “A0.0000” All values “G0A0.0200” to be changed to “G0A0.0000” All lines containing “M3 S1” to be removed All lines containing “M5” to be removed All lines with values higher than “A-1.0000” to became “A-1.0000”, i.e “A-2.0000” shall be changed to “A-1.0000” A feature to search and replace user defined values. I.e Find “F1100” replace with “F300” The new file to be saved with the same name of the original file plus “rev”. I.e. original file name “[login to view URL]” new file name “[login to view URL]” Example of file is attached Deliverable: source code. Please note, no third parties controls.