There is another pseudo-register useful when working with C# language:

$exception

It contains last exception that is thrown by an application.
Suppose that we have code like this:

with $exception pseudo-register you can easily examine it:

I found a very interesting feature of Visual Studio's debugger. It's been there for a long time but many developers do not know (including me) that pseudo-registers can be helpful.
There are more registers but I will mention just two of them.

@ERR

Well, it returns the same as GetLastError(), It optionally can return formatted string - just write it like @err,hr
I think I don't need to add more, screens below are self-explanatory

$user

Provides many informations about a user executing current process

Happy debugging.

Did you know where the C# name come from? I didn't
According to wikipedia: "The name "C sharp" was inspired from musical notation where a sharp indicates that the written note should be made a half-step higher in pitch".

Stupid