RichTextBox control allows the user to enter and edit text while providing a higher level than the average of the TextBox control formatting features.
RichTextBox control identifier .SelectionColor = Color.Blue; change the color of the selected character
RichTextBox control identifier .SelectionFont = new Font ( "official script", 20); change the font format and select the size of the character
.SelectionBullet = true; add bullets (preceded by a ●)
.SelectionBackColor background color, shading