What do you mean by a sentence?! If you mean anything that is ended by a '.' , '!' or '?' and combinations like "?!!!" is a sentence then you might apply a method to count them and thats easy. And for paragraphs, again you have to define it. if you define a paragraph where "Enter' is pressed and you go to another line you may get the line numbers of the text file, that is ReadLine of streamreader till you are at the end of file, or count the number of Linefeed/Carriage Return characters.