How to check a Server is available or not during installing process?

[shawnsang]

We want to download some R package from R Server ( http://cran.r-project.org ) during installing our R plugin.

Now, we hope to check the R server (http://cran.r-project.org) is available or not before we start downloading process.

So anyone have a good suggestion to implement the requirement?

[TsungH]

If C# custom action is an option, you can consider using Ping Class or HttpWebRequest Class.