public override string ToString()
        {
           StringBuilder memberOutput = new StringBuilder();
            memberOutput.AppendLine($"Member: {Name}");
            memberOutput.AppendLine("Tcks:");
            int num = 1;
            foreach (var task in tasks)
            {
                memberOutput.AppendLine($"{num++}. {task.ToString()}");
                memberOutput.AppendLine(StringGenerator('-', 10));
            }

            memberOutput.AppendLine($"Activity History:");
            num = 1;
            foreach (var activity in activityHistory)
            {
                memberOutput.AppendLine($"{num++}. {activity}");
                memberOutput.AppendLine(StringGenerator('-', 10));
            }

            return memberOutput.ToString();
        }