How to toggle class and interface name highlighting

Hi, I used to use Visual Studio, and I recetly switched to SharpDevelop. I like SharpDevelop, it has all features I need (and it's much smaller than VS), but I am missing one thing...
Visual Studio highlights code like this:
String a = String.Format("{0}-{1}", x, y);
But SharpDevelop shows this:
String a = String.Format("{0}-{1}", x, y);
I tried importing VS themes, but it didn't preserve the class name highlighting... I like the class and interface name highlighting, is there a way to bring it to SharpDevelop?