c# - 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 sentence which are as follows:

The child wanted to play in the mud

Hi there

Hector had a hip problem

if(sentence.contains("hi"))
{
   //
}

I only want the SECOND sentence to be filtered however all 3 gets filtered since CHILD has a 'hi' in it and hip has a 'hi' in it. How do I use the .Contains() such that only whole words get picked out?

Answer 1

Try using Regex:

if (Regex.Match(sentence, @"hi", RegexOptions.IgnoreCase).Success)
{
    //
};

This works just fine for me on your input text.