using System;
using System.Text.RegularExpressions;
public class Example
{
public static void Main()
{
string pattern = @"^(([a-z]+)_([0-9]+)(_([0-9]+))*)\-([0-9]+)x([0-9]+)\-([0-9]{1})([0-9abcdef]{6}){0,1}\.(jpg|gif|png)";
string input = @"attractions_300-217x168-1.jpg
villa_27_11213-850x567-1.jpg
";
Match m = Regex.Match(input, pattern);
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