c# - RichTextBox SelectionFont change back -

I am creating a rich textbox and I've got this code:

  richTextBox1.SelectionFont = New font ("Wordana", 10, font style. Regular); RichTextBox1.SelectionColor = Color.blue; RichTextBox1.Text + = "ddddd";   
 The text remains the same I have seen that RichTextBox1.Text changes my font back to the default font. How can I fix this?   
 
 
 Try using the attribute method:  
  rich textbox 1. Selection fonts = new font ("vardana", 10, font style. Regular); RichTextBox1.SelectionColor = Color.blue; RichTextBox1.AppendText ("ddddd"); RichTextBox1.SelectionFont = myDefaultFont; RichTextBox1. SelectionColor = myDefaultColor;