What is MyAssembly.XmlSerializers.dll generated for?

Question

I am working on a project which generates an assembly. I just noticed that an additional assembly *.XmlSerializers.dll is being generated. Why this file is auto generated an

Answer 1

I think this is the JIT (Just in time) compilation of XML serialisers for performance reasons.

You get the same thing with RegEx instances using the RegexOptions.Compiled option turned on.

I'm no .NET CLR expert, sorry for lack of precise technical detail.