C # Regular Expression Summary (symbol Operation)

1. Index \ 1 ,(? <Name>) \ <Name> to reference

2. Replace $ \ 1, $ {name}

RegEx. Replace (userinputstring, "(Mr | Mrs) [A-Z] *", "$1 x ");

RegEx. Replace (userinputstring ,"(? <Name> Mr | Mrs) [A-Z] * "," $ {name} X ");

(? (Exp) Yes | No)

(? (Name) Yes | no) group of name

(? I: [A-Z]) (? -I: [A-Z]).

If you want to delete an item, you only need to add-before the letter-

Replace with $, and the location can also be replaced

String test = "one test <123>, another test <321> ";

RegEx Reg = new RegEx (@"(? <=< )(? = \ D +> )");

String result = reg. Replace (test, "$ ");

Richtextbox2.text = result;