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How do I convert an IEnumerable(Of CheckingAccount) into an IEnumerable(Of Account) ? (where CheckingAccount inherits from Account).Currently this conversion isn't allowed, but we're considering a VB language feature to support it. The topic is called "co- and contravariance", and has been in the CLR since 2005 or so, but no one's yet released a .N...

Today I posted an interview screencast on Channel 9. In this interview, Jared Parsons, a Developer on the Visual Basic IDE, shows us the P/Invoke Interop Assistant available on CodePlex. The tool helps with converting unmanaged C code to managed P/Invoke signatures and vice versa. Say goodbye to digging through random header fil...

Last month when I was in Redmond I was pulled into a photo with some of the people working on Visual Basic. Do you notice something quirky about these pictures (besides me)? Yes, they are all wearing grey shirts! There's apparently a running joke going on with how Jonathan Aneja (top row, 4th from the left in the first picture) only wears grey. So ...

I'm happy to announce that the PInvoke Interop Assistant tool is now available on CodePlex.  This includes the binaries, source code and the dev authored unit tests.  It is hosted on the more general CLR Interop Tools page.  http://www.codeplex.com/clrinterop I will be actively maintaining this tool in the future and (hopefully) addi...

In yesterday’s blog post, I walked through an engine for translating DNA to its amino acid results via messenger RNA.  In today’s blog, we’ll work on the visualization using WPF StackPanels.  (This example requires VS2008, although it could certainly be written in WinForms as well with just a little bit of extra work.)Ca...

As I was preparing to graduate from the University of Michigan way back in the late eighties, I had a big decision to make regarding grad school – robotics at Carnegie Mellon, or biology at Washington State?  On the one hand, biology was something I’d always really loved, having even intended to go to med school at one point. ...

This post assumes you’ve read my previous Converting SQL to LINQ posts. I haven’t had much in the way of specific requests for more LINQ posts, so I’d still welcome any suggestions that people want to offer.  I did get one request about how to mimic the LIKE keyword functionality in VB LINQ. In SQL, the LIKE keyword...

Supporting the “pajama programmer”Telecommuting is a great thing, and as the environmentally-conscious person that I strive to be, is something I wholeheartedly endorse when it can be done practically.  My current job involves a lot of face-to-face meetings with people, so I don’t actually do a lot of it.  However, I do ...

All - I'm about to go on for my LINQ Deep Dive and Tips &Tricks session at VSLive in San Francisco. I posted all demos & slides here:https://code.msdn.microsoft.com/Release/ProjectReleases.aspx?ProjectName=LaunchVB&ReleaseId=805

After some hard but fruitful work, we’ve just finished our “milestone quality” (MQ) efforts, the goal of which was to get ourselves ready for developing the next versions of Visual Studio, Team System, and .NET.  Although not specific to Visual Basic, I’ve opted to use this “bully pulpit” to let you know abo...