c# - Getting nth property of a class -

am beginner in c# language

i have class

public  class plan {        int a;        int b;        int c;      }   

can in way nth property of class.

for eg: planobject.propertyindex

this of great project, getting index number denoting property value changed. doing right using if...else .

   if(index ==1)    {          planobject.a = 100;    }    else if(index ==2)        {       planobject.b = 100;    } 

is there other solution using reflection?

a word of warning, in no way beginners @ all. , might make code more complex. answer takes granted have working knowledge of extension methods , reflection.

public static class planextension {   propertyinfo _info = typeof(plan).getproperties();    public static void setvalue(this plan plan, int index, int value)   {     var prop = _info[index - 1]; // 1 maps 0.. or 1 in case     prop.setvalue(plan, value, null);   }    public static int getvalue(this plan plan, int index)   {     var prop = _info[index - 1]; // mapping magic     return (int) prop.getvalue(plan, null);   } } 

called this:

var p = new plan(); p.setvalue(1, 139); // "a" var b = p.getvalue(2); // "b" 

it if had definable order properties, name or something. also, error handling must when comes reflection.