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Asked: 2026-05-23T10:52:05+00:00

I am making a small program that downloads files from internet, depending on the

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I am making a small program that downloads files from internet, depending on the file version of another file.

Here is some of the code (where I am getting an error):

XmlDocument xdoc = new XmlDocument();
xdoc.Load("http://raiderz.daregamer.com/updates/app_version.xml");
XmlNodeList xNodeVer = xdoc.DocumentElement.SelectNodes("Version");
FileVersionInfo fileVer = FileVersionInfo.GetVersionInfo(AppDomain.CurrentDomain.BaseDirectory + "FileCheckVer.exe");
double ver_app = Convert.ToDouble(fileVer.FileVersion.ToString());
double ver_xml = Convert.ToDouble(xNodeVer);

The error says, “Input string was not in a correct format.” and points to the following line.

double ver_app = Convert.ToDouble(fileVer.FileVersion.ToString());

Does anyone know what the correct format is?

Thanks!

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1 Answer

  1. Editorial Team

    A FileVersion is in the Format d.d.d.d (2.0.0.0), where a double is just a floating point number (d.d).

    All the information you need is in the FileVersionInfo instance you already created (check the properties).

    /EDIT

    Answer to Q2. You need to use SelectSingleNode() to return an XmlNode, then you look at the .Value property of that.

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