oop - How to assign Mandatory Properties in class object in C# -

im working on .net using c#. in c# classes want use optional properties, have person class, in have properties name,age,city , gender.

 public class person  {    public string name{get; set;};    public int age {get; set;}    public string city {get; set;}    public string gender {get; set;}  } 

now assigned property values name,age , city.

 person objper = new person();  objper.name="abc";  objper.age="22";  objper.city="nyc";   string strresult = calperson(objper); 

now im passing person object 'objper' 1 method, returns property values of person in xml format below.im not passing value gender property.

 public string calperson(person objperson) {    //"<xml><name>abc</name><age>22</age><city>nyc</city><gender></gender></xml>"    return xml formated string. } 

while creating xml formatted string im getting gender node null value though not sending value it.

i want

    <xml>        <name>abc</name><age>22</age><city>nyc</city>     </xml> 

as output.

now have method calgender() accepts person object.

 objper = new person();  objper.gender="male";  public string calgender(person objperson) {    //"<xml><name></name><age></age><city></city><gender>male</gender></xml>"    return xml formated string. } 

while creating xml formatted string im getting name,age , city nodes value null though not sending value it.

i want

       <xml>           <gender>male</gender>        </xml> 

as output.

so, want use name,age , city properties calperson() method only. not want gender property in person class. want use gender property calgender() method only.i not want name,age , city properties in person class.

please suggest me how this...

aniljayanti.

you can use built in serializer datacontractserializer or xmlserializer , use [xmlignore] attribute skip properties not want serialize.

for more details, refer here