public static List<WoodPrice> ReadPrice(string fileLocation, string fileExtension, int idSchema)
        {
            List<WoodPrice> result = new List<WoodPrice>();

            string sheetname = "Схема " + idSchema;
            string Width, Height;
            int minWidth, maxWidth, minHeight, maxHeight;
            decimal price;

            int rowcount = 0, columncount = 0;

             Excel.Application app = null;
            
                Excel.Workbook wb = null;
                Excel.Worksheet sheet = null;

                try
                {
                    app = new Excel.Application();
                    wb = app.Workbooks.Open(fileLocation);
                    sheet = wb.Sheets[sheetname];

                    rowcount = sheet.UsedRange.Rows.Count;
                    columncount = sheet.UsedRange.Columns.Count;

                    for (int c = 2; c <= columncount; c++)
                    {
                        if (sheet.Cells[1, c].Value == null) break;

                        Width = sheet.Cells[1, c].Value.ToString();

                        if (Width.IndexOf('-') > 0
                               && int.TryParse(Width.Substring(0, Width.IndexOf('-')), out minWidth)
                               && int.TryParse(Width.Substring(Width.IndexOf('-') + 1), out maxWidth))
                        {
                            for (int r = 2; r <= rowcount; r++)
                            {
                                if (sheet.Cells[r, 1].Value == null) break;

                                Height = sheet.Cells[r, 1].Value.ToString();


                                if (Height.IndexOf('-') > 0
                                    && int.TryParse(Height.Substring(0, Height.IndexOf('-')), out minHeight)
                                    && int.TryParse(Height.Substring(Height.IndexOf('-') + 1), out maxHeight))
                                {
                                    price = sheet.Cells[r, c].Value == null ? -1 : (decimal)sheet.Cells[r, c].Value;

                                    result.Add(new WoodPrice() { idSchema = idSchema, 
                                                                minWidth = minWidth, 
                                                                maxWidth = maxWidth, 
                                                                minHeight = minHeight, 
                                                                maxHeight = maxHeight, 
                                                                price = price });

                                }
                            }

                            string buf = Width;
                            buf = buf + "";
                        }
                    }
                }
                finally
                {
                    wb.Close(null, null, null);
                    if(app != null) app.Quit();

                    System.Runtime.InteropServices.Marshal.ReleaseComObject(sheet);
                    System.Runtime.InteropServices.Marshal.ReleaseComObject(wb);
                    System.Runtime.InteropServices.Marshal.ReleaseComObject(app);


                    GC.Collect();
                }

                return result;
        }