using System;
using System.Text.RegularExpressions;
public class Example
{
public static void Main()
{
string pattern = @"^0+?(\d{2})";
string substitution = @"$1";
string input = @"001 - Filename 001.mp3
009 - Filename 009.mp3
010 - Filename 010.mp3
060 - Filename 060.mp3
086 - Filename 086.mp3
100 - Filename 100.mp3
1000 - Filename 1000.mp3
01001 - Filename 1001.mp3
01 - Filename with two leading numbers.mp3
1 - Filename with one leading number.mp3";
RegexOptions options = RegexOptions.Multiline;
Regex regex = new Regex(pattern, options);
string result = regex.Replace(input, substitution);
}
}
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