Common Way for updating status using c#

Hi,

I want to update the status using single common way in c#.

For now I know about  SetStateRequest but it did not change its status to any of status. e.g. If i want to change status to fulfilled for order or canceled for order then it requires FulfillSalesOrderRequest and CancelSalesOrderRequest .Like wise different different class for quote's status and other.

So I want some common way for change status.If is there any solution please suggest me.