Introduction

In this blog, we will see how to partially bold text in RichTextBox.

Step 1: Create a new windows forms application.



Form1.cs

  1. using System;
  2. using System.Collections.Generic;
  3. using System.ComponentModel;
  4. using System.Data;
  5. using System.Drawing;
  6. using System.Linq;
  7. using System.Text;
  8. using System.Threading.Tasks;
  9. using System.Windows.Forms;
  10. namespace RichTextBox_BoldPartialText
  11. {
  12. public partial class Form1: Form
  13. {
  14. public Form1()
  15. {
  16. InitializeComponent();
  17. }
  18. private void Form1_Load(object sender, EventArgs e)
  19. {
  20. for (int i = 0; i < 2; i++)
  21. {
  22. string str = "Hello";
  23. string str1 = "Hello1";
  24. int length = richTextBox1.Text.Length;
  25. richTextBox1.AppendText((((Convert.ToString((str + Convert.ToString(": "))) + str1) + "\r") + "\n"));
  26. richTextBox1.Select(length, str.Length);
  27. richTextBox1.SelectionFont = new Font(richTextBox1.Font, FontStyle.Bold);
  28. }
  29. }
  30. }
  31. }
RichTextBox



Output of the application looks like this



Summary

In this blog, we have seen how to partially bold text in RichTextBox.
Happy coding!