using System;

using System.Collections.Generic;

​

public class Program

{

    public static void Main()

    {

        Console.WriteLine("MT4 users exclusion\n");

        Func<User, bool> userExclusion = 

            user => user.comment.ToUpper().Contains("TEST") || (user.comment.Contains("NDB") && (!user.comment.Contains("FND,NDB")))

            ;

        List<User> users = new();

        users.Add(new User("Test"));

        users.Add(new User("NDB123"));

        users.Add(new User("FND,NDB77"));

        users.Add(new User("TEST_FND,NDB77"));

        foreach (var user in users)

        {

            Console.WriteLine($"User with comment: {user.comment} is excluded: {userExclusion(user)}");

        }

    }

​

    public class User

    {

        public string comment { get; }

​

        public User(string comment)

        {

            this.comment = comment;

        }

    }

}