private void monthComboBox_SelectedIndexChanged(object sender, EventArgs e)
        {
            string request = $"SELECT * FROM Statistics WHERE месяц = '{monthComboBox.SelectedItem}'";

            string[] statistick = _tableMenager.SelectInDB(request);
            _dataToExcel = statistick;

            ClearChart(monthChart);
            PrintStatistick(statistick, monthChart, monthComboBox.SelectedItem.ToString());
        }
        private double ColculateTrustLVl(int toPay)
        {
            string request = $"SELECT COUNT(Уровень_доверия) FROM Employees";

            string[] count = _tableMenager.SelectInDB(request);

            request = $"SELECT Уровень_доверия FROM Employees";
            string[] trustEmployees = _tableMenager.SelectInDB(request, int.Parse(count[0]));

            double meanTrust = 0;

            foreach (var trust in trustEmployees)
            {
                meanTrust += double.Parse(trust);
            }
            meanTrust += (toPay * 2 / 100);

            return(meanTrust / (trustEmployees.Length + 1.0));
        }