C# How do I get out of this loop? -

how out of loop?

i wrote program checks see if corresponding places in numbers same total. console output should true or false. wrote that, , added top part interacts user, , stuck in loop. how out of it?

using system;  namespace deliverablepart1 {     class deliverablepart1     {         static void main(string[] args)         {             string gameanswer;             bool repeat1 = true, repeat2 = true;              while (repeat1 == true)              {                 repeat2 = true;                 console.writeline("would compare 2 numbers see if corresponding place same total?");                 gameanswer = console.readline();                  while (repeat2 == true)                 {                     if (gameanswer == "yes" || gameanswer == "yes" || gameanswer == "yes")                     {                         console.writeline("please enter 3 digit whole number");                         string firstvalue = console.readline();                         int firstnumber = validinteger(firstvalue);                          console.writeline("please enter second 3 digit whole number");                         string secondvalue = console.readline();                         int secondnumber = validinteger(secondvalue);                          repeat1 = false;                         repeat2 = false;                     }                      else if (gameanswer == "no" || gameanswer == "no" || gameanswer == "no")                     {                         console.writeline("okay, exiting now");                         repeat1 = false;                         repeat2 = false;                     }                     else                     {                         console.writeline("i not understnad have said");                         repeat2 = false;                     }                      void add(int firstnumber, int secondnumber)                     {                         int length1 = firstnumber.tostring().length;                         int length2 = secondnumber.tostring().length;                          string userinput;                          if (length1 == length2)                         {                             string answer = convert.tostring(compare(firstnumber, secondnumber, length1));                         }                         else                         {                             userinput = "invalid user input - check number of digits next time.";                             console.writeline(userinput);                             console.readkey();                         }                         console.readkey();                     }                      int validinteger(string digit1)                     {                         int value = 0;                         string notint = "this not integer.";                         {                             bool successfullyparsed = int.tryparse(digit1, out value);                             if (successfullyparsed)                             {                                 int firstnumber = convert.toint32(value);                                 return value;                             }                             else                             {                                 console.writeline(notint);                                 console.readkey();                                 environment.exit(0);                                 return value;                             }                         }                     }                     string compare(int a, int b, int c)                     {                         int lastdigita;                         int lastdigitb;                          lastdigita = (a % 10);                         lastdigitb = (b % 10);                         int sumstatic = lastdigita + lastdigitb;                                                  {                             lastdigita = (a % 10);                             lastdigitb = (b % 10);                             = / 10;                             b = b / 10;                             c--;                             int sumcompare = lastdigita + lastdigitb;                              if (sumcompare != sumstatic)                             {                                 console.writeline("false");                                 return "false";                             }                         }                         while (c != 0);                         console.writeline("true");                         return "true";                     }                  }             }         }     } } 

from understanding, looks want user enter in 3 ints (with input validation), , put 3 ints through compare() function. if function returns true, "true" console, , if it's false "false" console. if that's case, refactored code (and doesn't stuck in loop):

using system;  namespace deliverablepart1 {     internal class deliverablepart1     {         private static void main(string[] args)         {             console.writeline("would compare 2 numbers see if corresponding place same total?");             var shouldcontinue = console.readline();              if (shouldcontinue != null && shouldcontinue.equals("yes", stringcomparison.currentcultureignorecase))             {                 var firstnum = getintfromuser("please enter 3 digit whole number");                 var secondnum = getintfromuser("please enter 3 digit whole number");                 var thirdnum = getintfromuser("please enter 3 digit whole number");                  console.writeline(compare(firstnum, secondnum, thirdnum) ? "true" : "false");             }             else             {                 console.writeline("exiting");             }              // waits user press key exit app, can see result             console.readkey();         }          /// <summary>         /// makes user enter in 3 digit number, , exits if "no"         /// </summary>         /// <param name="msg">the message prompt ask integer</param>         /// <returns>system.int32., or exit</returns>         public static int getintfromuser(string msg)         {             while (true)             {                 console.writeline(msg);                 var valfromuser = console.readline()?.trim();                  if (valfromuser != null)                 {                     int result;                     if (int.tryparse(valfromuser.trim(), out result) && valfromuser.length == 3)                     {                         return result;                     }                     if (valfromuser.equals("no", stringcomparison.currentcultureignorecase))                     {                         console.writeline("exiting.");                         environment.exit(0);                     }                 }                 console.writeline("hmm, that's not 3 digit number. try again.");             }         }          public static bool compare(int a, int b, int c)         {             var lastdigita = % 10;             var lastdigitb = b % 10;             var sumstatic = lastdigita + lastdigitb;                          {                 lastdigita = % 10;                 lastdigitb = b % 10;                 = / 10;                 b = b / 10;                 c--;                 var sumcompare = lastdigita + lastdigitb;                  if (sumcompare != sumstatic)                 {                     return false;                 }             } while (c != 0);             return true;         }     } }