Sorting an array of Doubles with NaN in it

Question

This is more of a \'Can you explain this\' type of question than it is anything else.

I came across a problem at work where we were using NaN values in a table, but

Answer 1

Actually, the strange sorting behavior is the result of a bug in .NET 3.5. The bug was addressed with .NET 4.0.

The only way to resolve it is to use your own custom comparer, or upgrade to .NET 4.0. See Why does .NET 4.0 sort this array differently than .NET 3.5?