how can I make a call to *190*phone number# in c#?

PhoneCallTask phoneCallTask = new PhoneCallTask();
phoneCallTask.PhoneNumber = "Phone Number Here";
phoneCallTask.DisplayName = "Display Name HERE";   
phoneCallTask.Show();

Try to do it with a PhoneCallTask, this will show in your Call screen the number and the name, the only thing that you have to do then is to hit the Call button.

Best regards.

Thanks Cristian,

after pressing the Call button I get this message:

"please enter service codes directly from the phone's keypad"

it seems that the phone can detect that this is not real a phone number but a request and block the request. It would be nice if I could open the Call keypad and insert this number in a way that the user need only to press "CALL" like the PhoneCallTask function.