using System;
using System.Text.RegularExpressions;
public class Example
{
public static void Main()
{
string pattern = @"\b(?:\d{1,2}[- \/]\s?){2}(?:\d{4}|\d{2})\b";
string input = @"11/11/1111
11-11-1111
11 11 1111
11- 11- 1111
11 11 1111
11-11 1111
23- 10-17
9 06- 17
1$0%11
";
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