using System;

 using System.Text;

 using System.IO;

 using System.Windows.Forms;

 using System.Diagnostics;

 namespace SharpDisplayManager

 {

     public class RichTextBoxTraceListener : TraceListener

     {

         RichTextBox iRichTextBox = null;

         public RichTextBoxTraceListener(RichTextBox aRichTextBox)

         {

             iRichTextBox = aRichTextBox;

         }

         public override void WriteLine(string aString)

         {

             //Add time stamp and new line characters

             Write(DateTime.Now.ToString("MM/dd HH:mm:ss.fff: ") + aString + "\r\n");

         }

         public override void Write(string aString)

         {

             //Allows iRichTextBox to be updated from different thread

             if (iRichTextBox.InvokeRequired)

             {

                 // Fire and forget invocation

                 // Using the synchronous variant Invoke tends to result in deadlock here

                 iRichTextBox.BeginInvoke(new MethodInvoker(delegate ()

                 {

                     iRichTextBox.Text += aString;

                 }));

             }

             else

             {

                 iRichTextBox.Text += aString;

             }

         }

     }

 }