c# - How to search for word in a string (just the word)? -

i want search string word.

however, don't want result if word searched inside other word. is

• i want return number 7 (index of letter f):

  findword("potato you", "for")

• but want return -1 (i.e., not found)

  findword("potato you", "or")

if use indexof, find substring "or" inside word "for".

is there simple way this?

char[] terminationcharacters = new char[] { '\n', '\t', ' ', '\r' };  //get array each word taken consideration string[] words= s.split(terminationcharacters, stringsplitoptions.removeemptyentries);  int indexofwordinarray = array.indexof(words, wordtofind); int indexofwordins = 0; (int = 0; <= indexofwordinarray; i++) {     indexofwordins += words[i].length; } return indexofwordins; 

but may not work if there multiple spaces between words. there pre-built way apparently simple thing, or should use regex?

you can use regular expression:

var match = regex.match("potato you", @"\bfor\b"); if (match.success) {     int index = match.index;     ... } 

\b indicates word boundary.

if don't need index want check if word in string, can use ismatch, returns boolean, instead of match.