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Jeroen W. Pluimers on .NET, C#, Delphi, databases, and personal interests

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Archive for February 17th, 2011

Some #reflector URLs

Posted by jpluimers on 2011/02/17

While it is still free…

The current version:

The “Check for Updates” entry in the “Help” menu checks this URL:¬†

Which currently returns:{Client}&Version={Version}

When Reflector detects there is a new version, you get a dialog like this:

.NET Reflector
A new version of .NET Reflector is available. Do you want to install automatically?
Yes No

When you press [Yes], it starts downloading from a URL that depends on the current version:

{Client} was replaced by Reflector, and {Version} was replaced by (the version of the currently running Reflector).


Posted in .NET, .NET 1.x, .NET 2.0, .NET 3.0, .NET 3.5, .NET 4.0, .NET 4.5, .NET CF, Development, Software Development | 1 Comment »

Verifying if two hosts are on the same IPv4 network

Posted by jpluimers on 2011/02/17

Recently, I wrote a bunch of code both in C# and Delphi to verify if two hosts are on the same IPv4 network.

Even though the public IPv4 address space is exhausted (IANA recently allocated the final two IPv4 blocks of their primary pool to APNIC, then allocated the five remaning /8 IPv4 blocks to the RIRs, thereby depleting the IPv4 pool), they are still used a lot, especially in private networks.

Over the next couple of weeks, you will see a couple of blog posts explaining:

  • how to get the IPv4¬†addresses¬†and network masks of network interfaces in your computer
  • how to convert those to and from strings
  • how to convert a¬†host-name¬†to a list of IP addresses
  • how to lookup the current¬†host-name
  • how network masks are related to counting leading/trailing ones and zeros
  • how to compare two IPv4 addresses given they have the same network masks

Those blog posts will have sample code in both Delphi and C#. And there will be unit tests to verify the underlying code.


Posted in .NET, C#, C# 2.0, C# 3.0, C# 4.0, Delphi, Development, Software Development | 2 Comments »

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