It's more Java than .NET, but should get it even if you are not a Java programmer:
Two
ints and a Float are in a bar. They spot an attractive Double on her own.
The
first int walks up to her. "Hey, baby", he says, "my VM or yours". She slaps
him and he walks back dejected.
The second int walks over. "Hey, cute-stuff,
can I cook your Beans for breakfast". After a
quick slapping, he too walks
back.
The Float then ambles over casually: "Were those two primitive types
bothering you?", he remarks.
"Yes. I'm so glad you're here", she says. "They
just had no Class!"