C# Default Parameters

Question

This is, probably, a very simple answer for someone. I have a method with an Optional Parameter like so;

public static Email From(string emailA         


        

Answer 1

If you compile that up and examine the output using a tool like ILDASM you'll see that the optional parameter is simply implemented by adding an attribute to the metadata that describes the method's formal parameters. As long as that attribute class is available on the target platform there should be no problem with using the emitted code on a downlevel platform.