Changing the font of text in richtextbox without affecting thepresent colour of text

[Gouri.Mahajan7]

Hello,

I want to change the font of the text in richtextbox without affecting
the colour of text. I want some text to be printed in different
colours. When I try to change the font of the text the colour is
turned to black. How to solve this problem.??

Thanks in advance.

Regards,
Gouri.