Autofit Excel

Question

I m having a code and i want my excel to autofit so i need a help

this is my code 

 

public static void ConvertExcelToPdf(string excelFileIn, string pdfFileOut)  

 {             

msExcel.Application excel = new msExcel.Application();             

try             

{                 excel.Visible = false;                 

excel.ScreenUpdating = false;                 

excel.DisplayAlerts = false;                   

FileInfo excelFile = new FileInfo(excelFileIn);                   

string filename = excelFile.FullName;                   

msExcel.Workbook wbk = excel.Workbooks.Open(filename, missing,                 

missing, missing, missing, missing, missing,                 

missing, missing, missing, missing, missing,                 

missing, missing, missing);                 

wbk.Activate();                     

 object outputFileName = pdfFileOut;                     

//wbk.FullName.Replace(".xslx", ".pdf");                 

msExcel.XlFixedFormatType fileFormat = msExcel.XlFixedFormatType.xlTypePDF;                 

// Save document into PDF Format                 

wbk.ExportAsFixedFormat(fileFormat, outputFileName,                     

Microsoft.Office.Interop.Excel.XlFixedFormatQuality.xlQualityMinimum, missing, false,                     

missing, missing,missing,                     

missing);                   

object saveChanges = msExcel.XlSaveAction.xlDoNotSaveChanges;                 

((msExcel._Workbook)wbk).Close(saveChanges, missing, missing);                 

wbk = null;             

}             

catch (Exception e)             

{             

}             

finally             

{                 

((msExcel._Application)excel).Quit();                 

excel = null;             

}         

}