using System;
using System.Text.RegularExpressions;
public class Example
{
public static void Main()
{
string pattern = @"\bp(ost|ostal)?(([ \.]*(O|0|o)(ffice)?)|([ \.]*box))([ \.]*Box)?\b";
string input = @"po box 1272
po box 29407
3001 p street suite a
po box 882
490 post st ste 700
530 post cpurt
530 post ct
postal box 1216
2 mile klondike highway po box 440
mile 1.5 klondike hwy po box 535
346 a tundra way po box 324
7307 s frontier drive/po box 877509
4540 edinburgh dr. po box 545, king salmon
650 oliver rd. po box 241702
#320 fortaleza street, po box 9024070,
10 el campo
";
RegexOptions options = RegexOptions.IgnoreCase;
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