using System;
using System.Text.RegularExpressions;
public class Example
{
public static void Main()
{
string pattern = @"\b\d{4}\b";
string input = @" '2025',
'2150 is the year to match',
'the year is 2030 see ref 2099662',
'Should match the year here YEAR_2140 even though it has non numric chars preceeding it',
'Should match the year at the end of a string like this - 2140',
'ref 2099662 the year is 2140. And there is another sentence',
'ref 2099662 the end of the string is the year 2140',
'There is no year here 2055667'";
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