using System;
using System.Collections .Generic ;
using System.IO ;
using System.Linq ;
using System.Text .RegularExpressions ;
public class Test
{
public static void Main( )
{
var lst = new List< string> { "70707_70708_70709_display1.jpg" ,
"70707_Front010.jpg" ,
"626-this files is tagged.jpg" ,
"1000x1000_webbanner2.jpg" ,
"2000 years ago_files.jpg" ,
"626gamingassets_styleguide.jpg" } ;
foreach ( var s in lst)
{
var results = s.Split ( '_' ) .TakeWhile ( x => x.All ( char .IsDigit ) && x.Length >= 3 ) .ToList ( ) ;
if ( results.Count > 0 )
Console.WriteLine ( "Results: {0}" , string.Join ( ", " , results) ) ;
else
Console.WriteLine ( "No match: '{0}'" , s) ;
}
}
}
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