textbox text color change

Question

I have textbox textbox1 and I want to change text color, but in the part of all text. For example from /* to */ like comm

Answer 1

You will have to derive a control from TextBox and put in code that will either allow the user to change the colour or changes the colour based on your rules.

A RichTextBox will give you the basis for this as it allows different "runs" of text each of which can have it's own styling:

  
    
      Paragraph 1
    
    
      Paragraph 2
    
    
      Paragraph 3
    
  

If you add controls for colour etc. then you can create a new run from the user's selection with the required style.