c# - My text file will not read into the array -

this has been answered. relatively new c# , experiencing problem. program keeps throwing error per try catch. have looked on , changed things, nothing seems work. error being thrown on line 49 (where while loop reading text file takes place). have idea issue?? know there may other issues min/max/average, can figure out. need me fix reading of file array.

the error code is: input string not in correct format. @ system.number.stringtonumber using system.collections.generic; using system.componentmodel; using system.data; using system.drawing; using system.linq; using system.text; using system.windows.forms; using system.io;

namespace total_sales_bbrantley { public partial class form1 : form {     public form1()     {         initializecomponent();     }      private void btncalc_click(object sender, eventargs e)     {         try         {             // declare variable hold amount of sales              // declare constant array size             const int size = 100;             // create array sales             double[] allsales = new double[size];             // declare variable holding total value of sales             double total = 0.0;             // declare variable hold average             double average;             // declare variable hold highest value             double highest = double.minvalue;             // declare variable hold lowest value             double lowest = double.maxvalue;              int count = 0;              // declare streamreader variable.             streamreader readfile;              // open file , streamreader object using relative path             readfile = file.opentext("sales.txt");              while (!readfile.endofstream && count < allsales.length)             {              error error error: [[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[   allsales[count] = int.parse(readfile.readline()); ]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]                 // increment count                 count++;           }               // close file             readfile.close();              lstsales.items.add("the file contains " + count + " items:");             (int index = 0; index < count; index++)             {                 lstsales.items.add(allsales[index]);              }                // display total             double sum = allsales.sum();             lbltotal.text = sum.tostring();              total += sum;             average = total / allsales.length;             lblaverage.text = average.tostring();              (int index = 1; index < allsales.length; index++)             {                 if (allsales[index] > highest)                 {                     highest = allsales[index];                 }                 lblhighest.text = highest.tostring();              }             (int index = 1; index < allsales.length; index++)             {                 if (allsales[index] < lowest)                 {                     lowest = allsales[index];                 }                 lbllowest.text = lowest.tostring();             }         }         catch (exception ex)         {             // display error message on bad input file              messagebox.show(string.concat("error calculating sales. ", ex.message,     "\r\n", ex.stacktrace));         }      }      private void btnexit_click(object sender, eventargs e)     {         //closes application         this.close();     } } 

}

i think issue using int.parse instead of double.parse.