while loop, windows form exercise c# -

updated thank replies. appreciated. apologize noob status. first assignment in c#, , first c# class. without previous programming experience @ all. lot of these concepts being first introduced. have done complete first section of assignment.

    public partial class form1 : form {     public bool oddnum(double value)     {         return value % 2 != 0;     }     public bool isprime(int n)     {         if (n > 1)         {             return enumerable.range(1, n).where(x => n % x == 0).sequenceequal(new[] { 1, n });         }         return false;     }     public bool evennum(double value)     {         return value % 2 == 0;     }     public form1()     {         initializecomponent();     }      private void btngo_click(object sender, eventargs e)     {         double start = double.parse(txtstart.text);         double end = double.parse(txtend.text);         double oddcount = 0;         double evencount = 0;         double evensum = 0;         double oddsum = 0;         double totalsum = 0;         double avrgnum = 0;         double avrgsum = 0;         double productnum = 1;                     while (start <= end)         {              if (oddnum(start))             {                 oddsum += start;                 oddcount++;             }             else             {                 evensum += start;                 evencount++;             }             totalsum += start;             productnum *= start;             avrgnum = totalsum / end;             avrgsum = avrgnum / totalsum;             start++;          }         string info = ("number of odd numbers: " + oddcount.tostring() + "\n" + "number of numbers: " + evencount.tostring() + "\n" + "sum of odd numbers: " + oddsum.tostring() + "\n" +                         "sum of numbers: " + evensum.tostring() + "\n" + "sum of numbers: " + totalsum.tostring() + "\n" + "product of numbers: " + productnum.tostring() + "\n" +                          "average: " + avrgnum.tostring("f2") + "\n" + "average / sum of numbers: " + avrgsum.tostring("f2"));         lbloutput.text = info;       }      private void btnprime_click(object sender, eventargs e)     {         int start = convert.toint32(txtstart.text);         if (isprime(start))         {             messagebox.show("the start number prime.");         }         else         {             messagebox.show("the start number not prime.");         }     }  } 

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"create windows forms application performs while loops, if-else statements , double type calculations."

while looping through while loop, should checking if number odd or even, calling 1 of methods (don't need both). this:

while (startingnumber != endingnumber) {     if (oddnum(startingnumber))         oddnumberslabel.text += " " + startingnumber;     else         evennumberslabel.text += " " + startingnumber;      startingnumber += incrementvalue; }