using System;
using System.Text.RegularExpressions;
public class Example
{
public static void Main()
{
string pattern = @"^ {0,3}[\-][ \t]*[\-][ \t]*[\-][\- \t]*$|^ {0,3}[\*][ \t]*[\*][ \t]*[\*][\* \t]*$|^ {0,3}[_][ \t]*[_][ \t]*[_][_ \t]*$";
string input = @"- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - abc";
RegexOptions options = RegexOptions.Multiline;
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