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

I have written another tiny tool which helps me in every-day work.
Look at the projects page.

Sometimes a programmer must do very weird things in his ASP.NET webapp. Among them, there is a postback initiated in custom javascript. Before .NET Framework 2.0, it was no good solution to achieve it. Fortunately it can be done without much effort nowadays.

There is an interface called IPostBackEventHandler which must be implemented by a page or a control. Then you must create javascript containing reference to postback function retrieved by ClientScriptManager.GetPostBackEventReference(...) method.

The sample web control's codebehind can look like below:

then we create javascript in aspx / ascx file:

Now, when a Test() function is called in a browser, our page will do a nice, clean postback