using System;
using System.Text.RegularExpressions;
public class Example
{
public static void Main()
{
string pattern = @"[+]?(?<!\d)(?<!\d[ -])
(?:
((\d{1,2}[ -]?)?[(]?\d{3}[)]?[ -]?)
(\d(?:[ -]?\d){3,6})
)(?![ -]?\d)";
string input = @"Matches:
--------
1234567 123 45 67 123-45-67
123456789012 12 345 678 9012 12-345-678-90-12
1 234 56 78 912 1 234 56 789 12 1 234 567 8 901
+1234567
+1234567890 +12-234 561 78 90 +12 234-561-78-90
+123456789012
+1 234 561 78 90
1(234)567-89-01
(495)1234567 (495) 123 45 67
+33 (014)-020 53 17
Doesn't match:
--------------
+123456 -- to short
+1234567890123 -- too long
123 4567890123 -- too long";
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