c# - Concat return values from different methods in same class to one value in another method -

is possible concat different return values different methods in same class 1 method? trying want take return values methods/functions , trying bring them 1 string or number in public static int generateid().

here code:

    static void main(string[] args)     {         int dateofbirth;         string name;         string surname;         string firstletr;           console.writeline("please enter date of birth in next sequence: yymmdd");         int dob = int.parse(console.readline());         dateofbirth = idenity.dateofbirth(dob);         console.clear();          console.writeline("please enter firsletter of name :");         name = console.readline().toupper();         console.writeline("please enter firsletter of surname:");         surname = console.readline().toupper();          firstletr = idenity.firstletters(name, surname);         console.clear();       }  } class idenity {     int dateofbirth, x, y, z;     string name, surname, male, female;      public static int dateofbirth(int dateofbirth)     {         int firstsixdigits = dateofbirth;          return firstsixdigits; //6     }     public static string firstletters(string name, string surname)     {         dictionary<string, int> firstletters = new dictionary<string, int>();         firstletters.add("a", 1);         firstletters.add("b", 2);         firstletters.add("c", 3);          firstletters.add("d", 4);         firstletters.add("e", 5);         firstletters.add("f", 6);         firstletters.add("g", 7);         firstletters.add("h", 8);         firstletters.add("i", 9);         firstletters.add("j", 10);         firstletters.add("k", 11);         firstletters.add("l", 12);         firstletters.add("m", 13);         firstletters.add("n", 14);         firstletters.add("o", 15);         firstletters.add("p", 16);         firstletters.add("q", 17);         firstletters.add("r", 18);         firstletters.add("s", 19);         firstletters.add("t", 20);         firstletters.add("u", 21);         firstletters.add("v", 22);         firstletters.add("w", 23);         firstletters.add("x", 24);         firstletters.add("y", 25);         firstletters.add("z", 26);          int valuefirstletters = int.parse(firstletters[name].tostring() + firstletters[surname].tostring());           return valuefirstletters.tostring();//3      }     public static string gender(string male, string female)     {         dictionary<string, int> gender = new dictionary<string, int>();             gender.add("m", 1);             gender.add("f", 2);             int valuegender = 0;              if (male == "m")             {                 valuegender = gender[male];                 return valuegender.tostring();             }             else             {                 valuegender = gender[female];                 return valuegender.tostring();             }//1           }      public static int randomize(int x, int y, int z)     {         random first = new random();         x = first.next(0,9);         random second = new random();         y = second.next(0, 9);         random third = new random();         z = third.next(0, 9);          int valuerandomize = int.parse(x.tostring() + y.tostring() + z.tostring());          return valuerandomize;//3      }     public static int generateid()     {         int idnumber = 0;         idnumber = dateofbirth(dateofbirth);     }  } 

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