using System;
using System.Text.RegularExpressions;
public class Example
{
public static void Main()
{
string pattern = @"(?|(<tr>)|<td>(.*)<\/td>)";
string input = @"<tr><td>r1c1</td> <td>r1c2</td><td>r1c3</td></tr> <tr><td>r2c1</td> <td>r2c2</td></tr> <tr><td>r3c1</td> <td>r3c2</td></tr>";
RegexOptions options = RegexOptions.IgnoreCase | RegexOptions.Singleline;
foreach (Match m in Regex.Matches(input, pattern, options))
{
Console.WriteLine("'{0}' found at index {1}.", m.Value, m.Index);
}
}
}
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for C#, please visit: https://msdn.microsoft.com/en-us/library/system.text.regularexpressions.regex(v=vs.110).aspx