Can I Delete Temporary Internet Files?

A question from a reader:

After reading your superb article on restoring your computer’s performance, I was
only wishing that you were in Sydney Australia rather than in the US. If you were running courses, I would be the first to enroll.

Whilst it may seem impertitent on my part, I was hoping you would not mind answering one question please.

When attempting to free up wasted space, can the ‘Temporary Internet files’ as well as the ‘Temporary files’ be cleaned out to speed up the start up of my Laptop. As you can tell, I am rather new at this.

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Free Training for the 70-515, 70-511 Microsoft Certification Exams

I just posted three groups of tutorials for the 70-515 and 70-511 Microsoft Certification Exams, including dozens of how-to videos, thousands of lines of source code, and three detailed  hands-on practice labs for Visual Studio 2010.

These tutorials cover .NET Framework fundamentals such as creating classes, using types and events, regular expressions, reading and writing files, and using collections. I designed these tutorials to give people the prerequisites they need to take the 70-515 and 70-511 Microsoft Certification exams. Everything is available in both C# and Visual Basic.NET.

If you find them useful and you want more, drop me a note. I’m happy to create more content if people like it.

How to Measure the Performance of Personal Firewalls

A question from a reader:

Hello,

I am currently a student at Liverpool John Moores University in BEng Computer and Control engineering and I have got a project to do.

The title of the project is “Performance of firewalls”, the goal is to compare the performance of different personal firewalls. I have already done a theoretical study thanks to your web page on firewalls and others books.

Now I’m faced with several problems for the practical test, because I do not know really how I can test the performances of different personal firewalls, how I can launch threats against the firewall to see his reaction, I wanted to know if you are able to guide me for carrying on my project, or when you can point me to people that could help me.

And my response (after the jump):

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Question about 70-515 Training Kit

I got this question from a reader:

I am studying for exam 70-515 using your excellent book and training kit. I just found what appears to be an error or maybe I didnt understand the wording used at page 87 where it says:
“ASP.NET calls the method you specify when it determines whether to use the cached version of the page. Depending on how you set the HttpValidationStatus in your handler, ASP.NET will use a cached page or a new, dynamically generated version.”
My question is, if asp.net already determined whether to use the cached  version of the page or not then what good is to set the HttpValidationStatus in your handler?

My response (after the jump):

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.NET Development: How to Browse Files, Folders, and Directories

These two videos show you how to work with the file system in Visual Basic .NET, C#, and Visual Studio 2010. This video shows you how to browse drives, folders, and files in a Windows Forms application (though it would work exactly the same in an ASP.NET Web application). This video can help you prepare for the 70-536, 70-515, and 70-511 MCTS or MCPD exams. A C# version of this video is also available.

First, the Visual Basic .NET version:

Now, the C# version:

How to Work With Null Values in C# and Visual Basic .NET

Here are Visual Studio 2010 videos I put together as part of a training course to pass the the 70-536, 70-515, or 70-511 MCTS or MCPD exams. Be sure to watch them in HD.

First, the Visual Basic version:

Next, the C# version:

How to Raise and Respond to Custom Events in .NET

Here are videos I put together as part of a training course to pass the the 70-536, 70-515, or 70-511 MCTS or MCPD exams. Be sure to watch them in HD. First, the Visual Basic version:

Next, the C# Version: