using System;
using System.Text.RegularExpressions;
public class Example
{
public static void Main()
{
string pattern = @"^((0[1-9]|[12]\d|3[01])\/(0[3578]|1[02])\/((202[1-9])))$|^((0[1-9]|[12]\d|30)\/(0[469]|11)\/((202[1-9])))$|^((0[1-9]|[1]\d|(2[0-8]))\/(02)\/(202[2-9]))$|^((0[1-9]|[12]\d|3[01])\/(01)\/((202[2-9])))$|^((2[0-8])\/(02)\/(2021))$";
string input = @"11/02/2022
";
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