Here is a shameless plug for my friend Mike who now has his own website at www.ireland-environmental.com.

If you need environmental services or help with getting the right permits to do construction and such, then Ireland Environmental Services is the place to go.
Mike is running a blog on environmental issues too, visit it here.

Today I had to fix a bug in some code involving a program creating multiple files where each file needed to have a unique machine generated filename. I was building my own unique name using the DateTime.Now.Ticks().ToString() as part of the name. Apparently on some machines the Ticks are not going to be unique. So I looked at the Path.GetTempFile() method, but I needed to control the location of the temporary files. Next stop: Path.GetRandomFileName().

Documentation:
The GetRandomFileName method returns a cryptographically strong, random string that can be used as either a folder name or a file name. Unlike GetTempFileName, GetRandomFileName does not create a file. When the security of your file system is paramount, this method should be used instead of GetTempFileName.

Works great!

We (the Maine Microsoft Certification Study Group) has been using Windows Live Groups as our virtual place to hang out. Out weekly meeting is posted on the group calendar, but the times kept showing up wrong on the overview page. As it turns out (thanks to Winston Natoli) there are three places where you can set the timezone:

Group Time Zone
- <Select Group or Access via Group Url>/ Options / Group Options/ General
Calendar Time Zone
<calendar.live.com>/ Options/ More Options / Time Zone
Live ID
<account.live.com>/ Registered Information/ Home Location/ Time Zone

After setting all of them to EST I’m now getting the right information.

Yeah, my last Training Kit is shipping!

Get a copy now at Amazon: http://tinyurl.com/dxwdz5

The documentation doesn't specifiy it but in the Entity Framework when you call ObjectContext.SaveChanges the update is 'wrapped' in a transaction.

NorthwindIBModel model = new NorthwindIBModel();

Guid id = Guid.NewGuid();

model.AddToCustomer(new Customer() { CustomerID = id, ContactName = "Andrew", CompanyName = "Northwind Traders" });
model.AddToCustomer(new Customer() { CustomerID = id, ContactName = "Aikido", CompanyName = "Northwind Traders " });

model.SaveChanges(); // exception duplicate key - transactional -> no changes to the database

Today I ran into a problem where apparently the registry settings for Visual Studio got messed up since I was no longer able to add a data connection in my Server Explorer, nor create an Entity Framework model from a database. Time to reset Visual Studio command(o) style.

To reset Visual Studio you open the Visual Studio Command Prompt and type:

devenv /resetsettings

And life is good...

On March 24th the Bangor .NET Developers will host an Ineta sponsored event where Steve Andrews will do a talk about the ASP.NET MVC Framework.

The ASP.NET MVC Framework provides a powerful Model View Controller (MVC) approach to building web applications, and provides separation of concerns, increased testability, control over HTML output, and intuitive URLs. We will start by looking at building a model framework with LINQ to SQL, including validation and model binding. Then, we'll explore a custom generics-based repository and services implementation. Finally, we'll tie it all together with a look at Views and jQuery.   Steve Andrews is a Team System MVP and INETA speaker, and has been working as a developer for more than 9 years. During this time, he has designed and developed applications in such widely varying areas as trust accounting, medical information management, supply chain management, and retail systems. Steve is also a MCTS, ICSOO, and community fanatic.   Go to www.bangordevelopers.com to sign up now.

The combined user groups of the SDN are putting together a terrific one day event with great sessions for software developers, architects, information workers and database professionals. Don't miss it!

Here is an overview of the sessions:

Go to www.sdn.nl/sde to sign up!

It often seems that management believes developers are highly exchangeable. Is an experienced developer leaving the team?

Then just new up a new .NET developer and you're done. This Dilbert episode reminded me of that attitude.

From www.dilbert.com

Once again the Maine Developer Network (thanks to John, Shawn and the State of Maine Government) is happy to help out Chris, Bob and Jim with finding a location to hold the MSDN Northeast Roadshow.

On March 19th the Roadshow will hit the Central Maine Commerce Center in Augusta. Go here to sign up today!

Location
Central Main Commerce Center
Florian Auditorium
500 Civic Center Drive Augusta Maine 04330
United States

Date
Thursday, March 19, 2009 8:30 AM - Thursday, March 19, 2009 4:00 PM Eastern Time (US & Canada)
Welcome Time: 8:00 AM

I just read Daniel's post on 'The Value of Commenting'. Food for thought people

I like to use the following rules of thumb:

a) Code should be self explanatory. This means using well named variables, properties and objects in order to make code as easy to read as possible. It should be obvious from the code what it is that it is trying to do.

b) Code should be easy to read. By easy I mean that you need to be able to scan it pretty fast. Sometimes comments can help make code easier to read by describing what is going on. I find this especially true in if/else constructions where a short comment can guide the reader of the code.

c) If more that one line of code is needed to describe a code block, consider refactoring the code to a private method and put comments on the method. A useful name for the method should help in achieving point (a).

d) Comments should describe why you're trying to do something, but this has limits. Extensive explanations on why the purchase amount of an order should never exceed $10000 should not be in the code. A list of rules should be maintained as part of the documentation and a reference to the rule should be made from the code comments.
Note: I have been known to document a list of rules as an enumerator, where the documentation of the rule is documented as the description of the enumerated value.

Actually (d) is the hardest one. When is it necessary to describe the 'why' of an operation?
The code is readable, the original programmer put it there for a reason. Are the comments there because the presence of the code needs to be justified? No! The 'why' comments are to facilitate (b).

As always, it's easy to spot useless comments, but hard describe a fixed set of rules to describe good comments. Use your brain!

But it is not the same as having a book that sits on your shelve and collects dust.

The Amazon Kindle 2 is here:

Lighter, better display, more storage and longer battery seem to be the improvements in the second generation Kindle.

I want one, but part of buying books and novels is the feel of collecting and adding to my library... I'm not sure I want to miss that feeling. I must be getting old fashioned

More info here.

I had to find out which platform supports which version of the .NET Framework. The information is a little fragmented, but here is the overview I came up with.

Windows 95
The .NET Framework cannot be installed on Windows 95.

Windows 98
.NET 1.0, .NET 1.1, .NET 2.0, .NET 3.0

Windows 98 SE
.NET 1.0, .NET 1.1, .NET 2.0, .NET 3.0

Windows ME
.NET 1.0, .NET 1.1, .NET 2.0, .NET 3.0

Windows NT 4.0 SP6a
.NET 1.0, .NET 1.1

Windows XP
.NET 1.0, .NET 1.1

Windows XP SP2
.NET 1.0, .NET 1.1, .NET 2.0, .NET 3.0, .NET 3.5

Windows 2000
.NET 1.0, .NET 1.1

Windows 2000 SP4
.NET 1.0, .NET 1.1, .NET 2.0

Windows Vista
.NET 2.0, .NET 3.0, .NET 3.5

Windows 2000 Server SP2
.NET 1.0, .NET 1.1

Windows Server 2003
.NET 1.1, .NET 2.0, .NET 3.0

Windows Server 2003 SP1
.NET 1.1, .NET 2.0, .NET 3.0, .NET 3.5

Windows Server 2003 R2
.NET 2.0, .NET 3.0, .NET 3.5

Windows Server 2008
.NET 2.0, .NET 3.0, .NET 3.5

Just to be clear, .NET 3.5 cannot be installed on:

• Microsoft Windows 95
• Microsoft Windows 98
• Microsoft Windows Millennium Edition
• Microsoft Windows NT Server
• Windows NT Workstation
• Windows NT Server Enterprise Edition
• Microsoft Windows 2000 Professional
• Windows 2000 Server
• Windows 2000 Advanced Server
• Windows 2000 Datacenter Server
• Windows Server 2003, Enterprise Edition for Itanium-based Systems
• Windows Server 2003, Datacenter Edition for Itanium-based Systems

References:

• http://msdn.microsoft.com/en-us/library/ms973853.aspx
• http://msdn.microsoft.com/en-us/library/ms229068(VS.80).aspx
• http://msdn.microsoft.com/en-us/library/bb882520.aspx

[UPDATE: .NET 3.0 will not run on Windows 2000 or Windows 200o SP4]

I regularly get asked for references on which books are interesting for people starting with C# and .NET. I'm not good at remembering books, but usually squeeze out a reference. Today I ran across a good list of Essential Reading compiled by my DevelopMentor colleague Tony Sneed. I'm shamelessly copying it here since I concur with his list.

Essential .Net 2.0 Reading

The C# Language

• Essential C# 2.0 by Mark Michaelis

.Net in General

• CLR via C#, Second Edition by Jeffrey Richter
  
• Programming .NET Components, 2nd Edition by Juval Lowy

Windows Forms

• Windows Forms 2.0 Programming 2nd Edition by Chris Sells
  
• Data Binding with Windows Forms 2.0 by Brian Noyes
  
• Smart Client Deployment with ClickOnce by Brian Noyes

Web Apps

• Essential ASP.NET With Examples in C# by Fritz Onion
  
• Essential ASP.NET 2.0 by Fritz Onion and Keith Brown

Essential .Net 3.0 Reading

Presentation Foundation

• Essential Windows Presentation Foundation by Chris Anderson
  
• Windows Presentation Foundation Unleashed by Adam Nathan
  
• Programming WPF by Chris Sells and Ian Griffiths

Workflow

• Programming Windows Workflow Foundation by K. Scott Allen
  
• Essential Windows Workflow Foundation by Shukla, et al

Communication Foundation

• Learning WCF by Michele Bustamante
  
• Programming WCF Services by Juval Lowy

CardSpace

• Understanding Windows CardSpace by Bertocci, et al

Microsoft has started a new ad campaign. Why mention it here? I like the ad, that's why.

The year is off to a great start! I got an email this morning informing me I've been awarded the MVP Award 2009. Terrific! 

Quote: The Microsoft MVP Award provides us the unique opportunity to celebrate and honor your significant contributions and say "Thank you for your technical leadership."

Today I needed a query to see what the size and growth settings were for our databases. The query below will output name, size and growth information.

SELECT  SUBSTRING([name], 0, 40) as [Name],
                (([size]*8)/1024) as SizeMB,
                CASE [growth]
                        WHEN 0 THEN 'Fixed Size'
                        ELSE
                                CASE [is_percent_growth]
                                        WHEN 0 THEN 'Absolute growth: ' + CAST([growth] as varchar)
                                        WHEN 1 THEN 'Percentage growth: ' + CAST([growth] as varchar)
                                END
                END as [GrowthInfo]
FROM    sys.database_files

Output looks like this:

Name                                     SizeMB      GrowthInfo
---------------------------------------- ----------- -------------------------------------------------
AdventureWorks                           10          Fixed Size
AdventureWorks_log                       5           Fixed Size

Microsoft has release SQL Server 2005 Service Pack 3, download the service pack here.

Release notes can be found here and there is also a list of the bugs that are fixed in SQL Server 2005 Service Pack 3. Looks like around 45 bugs fixes!