Get only Whole Words from a .Contains() statement

Question

I\'ve used .Contains() to find if a sentence contains a specific word however I found something weird:

I wanted to find if the word "hi" was present in a se

Answer 1

You could split your sentence into words - you could split at each space and then trim any punctuation. Then check if any of these words are 'hi':

var punctuation = source.Where(Char.IsPunctuation).Distinct().ToArray();
var words = sentence.Split().Select(x => x.Trim(punctuation));
var containsHi = words.Contains("hi", StringComparer.OrdinalIgnoreCase);

See a working demo here: https://dotnetfiddle.net/AomXWx