using System;
using System.Text.RegularExpressions;
public class Example
{
public static void Main()
{
string pattern = @"\(?([A-Z0-9]{3})\)? \(?([A-Z0-9]{3})\)? \(?([A-Z0-9]{4})\)?";
string input = @"8009228080
(900) (CAT) BABA
(+1) (900) (289) (9000)
900.900.9000
(+1) (900) (289) (9000)
(+1) (900) 289 (9000)
+1 (900) 982 8728";
foreach (Match m in Regex.Matches(input, pattern))
{
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