c# - Change Private Property of Class -

my person class:

 class person {     public string firstname { get; private set; }     public string lastname { get; private set; }     public int age { get; private set; }      public person(string firstname,string lastname,int age)     {         this.firstname = firstname;         this.lastname = lastname;         this.age = age;       }      public override string tostring()     {         return this.firstname + " " + this.lastname + " " + this.age;      }    } 

main:

 class program {     static void main(string[] args)     {         person sallyperson = new person("sally", "solomon",23);      } } 

lets want change firstname , age of person, how go doing so? firstname , age properties set privately.

so realized, of answers assuming question you're asking literally question you're asking, rather example. perhaps were using example, , need set private property of object don't control source of? in case, say, that's bad idea, if need anyway, there way. way called "reflection" (this being 1 of many kind-of-sketchy things can reflection if want). this question might want at, if you're after.

more likely, though, correct response don't have properties private if control source class, , going want change them.