using System;
using System.Text.RegularExpressions;
public class Example
{
public static void Main()
{
string pattern = @"(?:\d{3}-| # area code without parentheses but with dash
\(\d{3}\)\ ) # -or- area code with parentheses and no dash
\d{3} # first 3 digits
- # second dash
\d{4} # last 4 digits";
string input = @"(415) 123-2342 and 415-905-1234 are the numbers.";
RegexOptions options = RegexOptions.IgnorePatternWhitespace;
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