using System;
using System.Text.RegularExpressions;
public class Example
{
public static void Main()
{
string pattern = @"((\d{4})(-| )(\d{3})(-| )(\d{4})|((04|\+61)(\d{10}|\d{9}|\d{8}))|((04|\+04|61|\+61)( |-)(\d{1})( |-)(\d{4}|\d{3})( |-)(\d{4}|\d{3})))";
string input = @"regex australian phone number format (e.g. 0412-123-4567) or (e.g. 0412 123 4567) or (e.g. 0412-123 4567) or (e.g. 0412345678) or (e.g. +61 4 1234 5678) or (e.g. +61 4 1234 567) or (e.g. +6101234567) or (e.g. +61012345678)";
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