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

Answer 1

I found a second really strange corner case that beats my first one by a long shot.

String.Equals Method (String, String, StringComparison) is not actually side effect free.

I was working on a block of code that had this on a line by itself at the top of some function:

stringvariable1.Equals(stringvariable2, StringComparison.InvariantCultureIgnoreCase);

Removing that line lead to a stack overflow somewhere else in the program.

The code turned out to be installing a handler for what was in essence a BeforeAssemblyLoad event and trying to do

if (assemblyfilename.EndsWith("someparticular.dll", StringComparison.InvariantCultureIgnoreCase))
{
    assemblyfilename = "someparticular_modified.dll";
}

By now I shouldn't have to tell you. Using a culture that hasn't been used before in a string comparison causes an assembly load. InvariantCulture is not an exception to this.