Why doesn't this code work?
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Text.RegularExpressions;
namespace WindowsFormsApplication2
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void button1_Click(object sender, EventArgs e)
{
for (Match match = new Regex(@"<(/|)[^(>|\s)]*").Match(richTextBox1.Text); match.Success; match = match.NextMatch())
{
richTextBox1.Select(match.Index + 1, match.Value.Length - 1);
richTextBox1.SelectionColor = Color.Brown;
richTextBox1.DeselectAll();
richTextBox1.SelectionColor = Color.Black;
}
for (Match match2 = new Regex("123").Match(richTextBox1.Text); match2.Success; match2.NextMatch())
{
richTextBox1.Select(match2.Index, match2.Value.Length);
richTextBox1.SelectionColor = Color.Red;
richTextBox1.DeselectAll();
richTextBox1.SelectionColor = Color.Black;
}
}
}
}Each time I write "123" in the richtextbox does the program stop working.
Why does the program stop working when I write "123" and what code should I use instead?
