change the font for richtextbox uxing C #

Question

please help me,

 how to change Title font color blue, remaining Description and Link fonts are normal in the below code using C#.


rtb.Text += "Title: "+ rssChannel.GetString("title") +  " \r\n";
rtb.Text += "Description: " + rssChannel.GetString("description") + "\r\n";
rtb.Text += "Link: " + rssChannel.GetString("link") + "\r\n";

With Warm Regards
Sujit
Phone [phone](India)