How to get the current class name at runtime?

I'm trying to get a current class name into a string.

For example:

public class Marker : Mark
{
    string currentclass = ???;
}

public abstract class MiniMarker : Mark
{
}

I'd like to get the string from Marker class so I do not have to put it inside each abstract class I make from it.

I want the string to be MiniMarker, or what ever the abstract class is named.

I tried MethodBase.GetCurrentMethod().DeclaringType, but it did not work.