title: Creating a loop in StringBuilder to alter a text file
body: <p>I would be grateful with some help with reading a text file into a Richtext box. The code I have at present appends the first line of text as I want it but the rest of the lines of text do not alter. I need a loop to read to the end of file and display in Richtext box. the code i have at present is this:-</p>
  
  <pre><code>Dim FILE_NAME As String = "C:\Test.txt"
  Dim sr As New System.IO.StreamReader(FILE_NAME)
  RichTextBox1.Text = sr.ReadToEnd
  
  Dim sb As New System.Text.StringBuilder(RichTextBox1.Text)
  sb.Insert(5, " ")
  sb.Insert(12, " ")
  sb.Insert(18, " ")
  sb.Insert(25, " ")
  sb.Insert(29, " ")
  sb.Insert(32, " ")
  sb.Insert(37, " ")
  sb.Insert(44, " ")
  sb.Insert(45, " ")
  
  RichTextBox2.Text = sb.ToString
  
  sr.Close()
  </code></pre>