words highlight in c#ASP.net

[jojee]

Can anyone help me that how we can highlight the words in c# Asp.net like
e.g
i have a string str="hi what is ur name";
in this pharase i want to highlight the word "hi what is" plz reply me if u have any solution thanx its very urgent

[Plater]

You will need to do this with markup then.
either in javascript or the backend.