var where = "Id > 2 && EventTrain == "Transit"";
var filtred= trains.Where(where).ToList(); //trains - список поездов

var where = "ArrivalTime > DateTime.Now.AddMinute(-100) && ArrivalTime < DateTime.Now.AddMinute(100)";

$"DateTime({now.Year}, {now.Month}, {now.Day}, {now.Hour}, {now.Minute}, {now.Second})"

var where = "ArrivalTime > DateTime.Now.AddMinute(-100) && ArrivalTime < DateTime.Now.AddMinute(100)";

if (Regex.Match(where, "DateTime.Now.AddMinute\((.*)\)").Success)
                {
                    var val= Regex.Match(where, "DateTime.Now.AddMinute\((.*)\)").Groups[1].Value;
                    if (int.TryParse(val, out var min))
                    {
                        var date = now.AddMinutes(min);
                        where = where.Replace("DateTime.Now", $"DateTime({date.Year}, {date.Month}, {date.Day}, {date.Hour}, {date.Minute}, 0)");
                    }
                }

var where = "ArrivalTime > DateTime.Now.AddMinute(-100)"

var where = "(ArrivalTime > DateTime.Now.AddMinute(-100)) && (ArrivalTime < DateTime.Now.AddMinute(100)) && (EventTrain == "Transit")";

var where = "ArrivalTime > @0 && ArrivalTime < @1";

trains.Where(where, DateTime.Now.AddMinutes(-100), DateTime.Now.AddMinutes(100))