using System;
using System.Text.RegularExpressions;
public class Example
{
public static void Main()
{
string pattern = @"^(?:\+?1\h*)?(?:(\()?\d{3}(?(1)\))[-. ]?\d{3}[-. ]?\d{4})$";
string input = @"589-845-2889
(589)-845-2889
589.845.2889
589 845 2889
5898452889
(589) 845 2889
1(589) 845 2889
+1(589) 845 2889
1589 845 2889
1 589 845 2889
15898452889
+1207 244 7002
+1 207 244 7002
(589) 845-2889
+1(589) 845-2889
1(589) 845-2889";
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