Memory problems while creating large excelfile using OpenXml.Spreadsheet

public static void InsertDataToExcelFile(SpreadsheetDocument sheet, DataTable table) 
        { 
            sheet.AddWorkbookPart(); 
            sheet.WorkbookPart.Workbook = new Workbook(); 
            sheet.WorkbookPart.Workbook.AppendChild(new Sheets()); 
       WorksheetPart newWorksheetPart = sheet.WorkbookPart.AddNewPart<WorksheetPart>(); 
            newWorksheetPart.Worksheet = new Worksheet(); 
        uint worksheetNumber = 1; 
 
SheetData sheetData = newWorksheetPart.Worksheet.AppendChild(new SheetData()); 
 
int numberOfColumns = table.Columns.Count; 
bool[] IsNumericColumn = new bool[numberOfColumns]; 
Row newRow = sheetData.AppendChild(new Row()); 
Cell newCell; 
foreach (DataRow dr in table.Rows) 
            { 
                newRow = sheetData.AppendChild(new Row()); 
          for (int colInx = 0; colInx < numberOfColumns; colInx++) 
                { 
         string cellValue = dr.ItemArray[colInx].ToString(); 
 
         if (IsNumericColumn[colInx] && !string.IsNullOrEmpty(cellValue))    
               {             
                 newCell = CreateNumericCell(cellValue); 
                } 
                else 
               { 
                        newCell = CreateTextCell(cellValue); 
                       }   
 
                  newRow.AppendChild(newCell); 
                } 
            } 
            newWorksheetPart.Worksheet.Save(); 
           sheet.WorkbookPart.Workbook.GetFirstChild<Sheets>().AppendChild(new Sheet() 
            { 
                Id = sheet.WorkbookPart.GetIdOfPart(newWorksheetPart), 
                SheetId = worksheetNumber++, 
                Name = table.TableName 
            }); 
            sheet.WorkbookPart.Workbook.Save(); 
        }