using System;
using System.IO;
using System.Text.RegularExpressions;
public class Test
{
public static void Main()
{
var fileList = new string[] {"some text", "uploading text", "upload it"};
foreach (var file in fileList)
{
if (!Regex.IsMatch(file, @"(?i)\bupload\b"))
Console.WriteLine(file);
}
}
}
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