What's the strangest corner case you've seen in C# or .NET? [closed]

Answer 1

I'm not sure if you'd say this is a Windows Vista/7 oddity or a .Net oddity but it had me scratching my head for a while.

string filename = @"c:\program files\my folder\test.txt";
System.IO.File.WriteAllText(filename, "Hello world.");
bool exists = System.IO.File.Exists(filename); // returns true;
string text = System.IO.File.ReadAllText(filename); // Returns "Hello world."

In Windows Vista/7 the file will actually be written to C:\Users\\Virtual Store\Program Files\my folder\test.txt