Advanced RegEx C# Parser for Word Replacement

Develop a regex program to perform character and word replacements on large strings to fix errors. ? The regex operations consist of: 1) Replacement of several extended unicode characters. ? For example, replace 'latin small ligature ff' with 2 'f' chars - see? <[login to view URL]> [][1]2) Loop through a list of known word errors and corrections, perform regex replacements, while preserving any capitalization. For example, find 'instrucXons' where 'X' is 1 or 2 characters (including a space) and replace with 'instructions' In addition, implement nHunSpell to perform a spell check on each string, saving all misspelled words to a simple text file. A next project will require sentence and word parsing (that ignores sentence termination and other chars). ? Please be qualified for this next project as well.