'Extends' and 'Implements' Java equivalents in C#

Would look something like this:

public class Lion :Animal, Diurnal {
}

Where Animal is a class and Diurnal is an interface.

Please note, that according to the C# naming convention, interface has to have "I" infront of its name, so finally it should look like this:

public class Lion :Animal, IDiurnal {
}