Microsoft.Office.Interop.Excel.Application excel = new Microsoft.Office.Interop.Excel.Application();
            excel.Visible = true;
            object Missing = Type.Missing;
            Workbook workbook = excel.Workbooks.Add(Missing);
            Worksheet sheet1 = (Worksheet)workbook.Sheets[1];
            int StartCol = 1;
            int StartRow = 1;
            for (int j = 0; j < dg_teamTC.Columns.Count; j++)
            {
                Range myRange = (Range)sheet1.Cells[StartRow, StartCol + j];
                myRange.Value2 = dg_teamTC.Columns[j].HeaderText;
            }
            StartRow++;
            for (int i = 0; i < dg_teamTC.Rows.Count; i++)
            {
                for (int j = 0; j < dg_teamTC.Columns.Count; j++)
                {
                    Range myRange = (Range)sheet1.Cells[StartRow + i, StartCol + j];
                    myRange.Value2 = dg_teamTC[j, i].Value.ToString() == null ? "" : dg_teamTC[j, i].Value.ToString();
                    myRange.Select();
                }
            }

            //sheet1.Range.EntireRow.AutoFill();
            excel.Columns.AutoFit();
            excel.Rows.AutoFit();
            // Вызываем сборщик мусора для немедленной очистки памяти
            GC.GetTotalMemory(true);