button print 2-3 line of text

Question

i want to create button in c# application that should print paragraph text or new line(2-3 lines of) texts into richTextbox. Help please!

Answer 1

You can do it with next:
RichTextBox.Clear();
RichTextBox.AppendText("Your text line 1" + System.Enviroment.NewLine());
RichTextBox.AppendText("Your text line 2" + System.Enviroment.NewLine())