formatting text in richtextbox

Question

hi every body i am building a chat system i want if user send a message or recive a message the color of the nickname is blue in the richbox

Answer 1

Coloring text inside a rich textbox is a matter of providing the input as RTF. Have a look at this article on how to do so http://www.codeproject.com/KB/cs/RTFSyntaxColour.aspx

Answer 2

Just use the SelectionColor property to change the color of the text:

private void button1_Click(object sender, EventArgs e) {
  richTextBox1.AppendText("blahblah\n");
  Color prev = richTextBox1.SelectionColor;
  richTextBox1.SelectionColor = Color.Blue;
  richTextBox1.AppendText("nobugz\n");
  richTextBox1.SelectionColor = prev;
  richTextBox1.AppendText("blahblah\n");
}

You can also use SelectionBackColor to change the background color.