Is there a syntax for creating an anonymous subclass in C#?

Can I create instance of abstract class in C#/.net like in Java ?

Additional Info

I think a lot of us does not understand what do I mean? So, In java I can create abstract class like this :

Simple abstract class :

/**
 * @author jitm
 * @version 0.1
 */
public abstract class TestAbstract
{
    public abstract void toDoSmth();
}

Code where I've create instance of abstract class

/**
 * @author jitm
 * @version 0.1
 */
public class Main {
    public static void main(String[] args) {
        TestAbstract testAbstract = new TestAbstract() {
            @Override
            public void toDoSmth() {
                System.out.println("Call method toDoSmth");
            }
        };
    }
}

Can I to do in c# something like this ?