How can I only replace a specific word in a string using C#?

I have a string

 var query =  select id, Details.Id, Details.Info.Id from DetailsItem

I want to replace Details with [Details], so I am using

query.Replace(" Details", " [Details]");

I get the following

select id, [Details].Id, [Details].Info.Id from [Details]Item

but it replaces DetailsItem which I dont want. How can I only replace if the word is Details only?

>Solution :

You should use Regex.Replace() method with word boundary i.e \b,

string queryResult = Regex.Replace(query, @"\bDetails\b", "[Details]", RegexOptions.None);  

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