using System;

using System.Text.RegularExpressions;

public class Program

{

    public static void Main()

    {

        string message = "me.jpg;screenshot-1.png;materialize-v0.95.3.zip;jQuery-Multiple-Select-Plugin-For-Bootstrap-Bootstrap-Multiselect.zip;";

        var pattern = new Regex("");

        string newmessage = "";

        if(pattern.IsMatch(message))

        {

            newmessage = Regex.Replace(message, "me.jpg;screenshot-1.png;", string.Empty);

        }

        Console.WriteLine(newmessage);

    }

}