using System;
using System.Text.RegularExpressions;
public class Example
{
public static void Main()
{
string pattern = @"^0(\d{1,2}(-\d{4}){2}|\d{3}(-\d{3}){2}|\d{2}-\d{3}-\d{4}|\d{3}-\d{2}-\d{4}|\d{4}-\d{1}-\d{4})$";
string input = @"090-1111-1111
03-1111-1111
0120-111-111
042-111-1111
0436-11-1111
02222-2-2222
0333-333-33
033-333-333
01-1111-1111
0-11111-1111
02-11111-111
022-123-1231
";
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