Namespace called NUnit

Today I was looking for a compact and fast CSV reader and found one. It satisfies all my requirements. But when I was reading comments some guy had a problem and didn't know what to do with it. Ready? He wrote following: I downloaded the .NET 2.0 demo version, and it won't run because it is looking for a namespace called NUnit. The author is a really good guy - he politely answered to add reference to NUnit or remove NUnit project from solution. I was laughing some minutes of this. Are there people (developers) in the world who don't know about xUnit? Or maybe he is just not a developer... Or maybe he's just having fun asking it... There can be some excuses for him. But anyway it was very funny for me to see such kind of a question.