c# - Classes with the same interface but different types for a property -

i have kind of design :

public interface idifferenttypes { }  public class integertype : idifferenttypes {     public int value { get; set; } }  public class stringtype : idifferenttypes {     public string value { get; set; } }  public class datetimetype : idifferenttypes {     public datetime value { get; set; } } 

but property 'value' defined in interface.

so can call :

idifferenttypes someint = getsomeint(); // getsomeint() returns integertype object assert.areequal(5, someint.value);  idifferenttypes somestring = getsomestring(); // getsomestring() returns stringtype object assert.areequal("ok", somestring.value); 

problem type of value different each implementation, best way deal that?

you define generic interface (but have property, or, more strictly, can't field):

public interface ihasvalue<t> {   t value { get; } } 

where t type, placeholder, if will, , can do:

public class hasstringvalue : ihasvalue<string> {   public string value { get; private set; } }