title: How to append the string at a cursor position in a rich text box C#?
body: <p>I want to add string in rich text box at that position where the cursor is blinking. I also want to change the color of text that I entered. For example If there is pre-entered text which color is black, then I entered a new string then this string should have blue color. And it should be for all the time i entered the string. And the strings I entered, they should remain blue. thanks</p>