c# - Some tips concerning exception handling would be appreciated -

not sure if should here or on code review, here goes!

i have little console application read in excel data of exceldatareader. code console application:

class program {     static void main(string[] args)     {         somedata data = new somedata(@"c:\sc.xlsx", "somedata_2014");         ienumerable<sometype> sometypes = somedata.getdata();          console.readline();     } } 

please don't worry naming of variables; company , don't want use company related. next somedata class:

public class somedata {     private string path;     private string worksheetname;      public somedata(string path, string worksheetname)     {         this.path = path;         this.worksheetname = worksheetname;     }      public ienumerable<sometype> getdata(bool isfirstrowascolumnnames = true)     {         var exceldata = new exceldata(path);          try         {             var ad = exceldata.getdata(worksheetname, isfirstrowascolumnnames);              return ad.select(datarow => new sometype()             {                 gemeente = datarow["livingplace"].tostring(),                 geslacht = datarow["outdoors"].tostring(),                 woonplaats = datarow["wellhellyesorno"].tostring()             }).tolist();         }         catch (filenotfoundexception ex)         {             throw;         }         catch (argumentexception ex)         {             throw;         }     } } 

and finally, exceldata class level lower somedata class:

public class exceldata {     private string path;      public exceldata(string path)     {         this.path = path;     }      private iexceldatareader getexceldatareader()     {         try         {             using (filestream filestream = file.open(path, filemode.open, fileaccess.read))             {                 iexceldatareader datareader = null;                  if (path.endswith(".xls"))                 {                     datareader = excelreaderfactory.createbinaryreader(filestream);                 }                  if (path.endswith(".xlsx"))                 {                     datareader = excelreaderfactory.createopenxmlreader(filestream);                 }                  return datareader;             }         }         catch (filenotfoundexception ex)         {             console.writeline(ex);             throw;         }     }      public ienumerable<datarow> getdata(string sheet, bool isfirstrowascolumnnames = true)     {         var reader = getexceldatareader();         reader.isfirstrowascolumnnames = isfirstrowascolumnnames;         var worksheet = reader.asdataset().tables[sheet];         var rows = datarow row in worksheet.rows select row;          return rows;     } } 

what i'm trying do, when goes wrong e.g. opening excel file, throw exception, , bubble can write out @ top level.

the same goes getdata method of somedata class; @ moment want read data column , goes wrong, throw exception bubbles once again can write out @ top level.

i'm looking best way this.

exceptions "bubble" default; there's no point in rethrowing exception without doing anything, that's wasted code , cpu. in fact, that's pretty whole modus operandi of exceptions - whatever happens, wherever happens, bubble first guy ready handle it. need try { ... } catch (whateverexception ex) { ... } @ point you're ready handle it.

any exceptions aren't handled @ kill application (although note frameworks winforms give option e.g. try , continue - in general, though, should handle anyway, it's final safety net).