using System;
using System.Text.RegularExpressions;
public class Example
{
public static void Main()
{
string pattern = @"^([\w.]{1,})\.([\w]{3,4})\.([\w]{3,4})$";
string input = @"file.txt
file.txt.txt
file.one.two.thre
file.one.two.three
file.google.txt.jar
jim.joe.chris
something.filename.pdf.lnk
filename.pdf.123
thisfile.hasadotbutonlyone.exe
thisfile.xlsx.xlsx
thisfile.12.123";
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