How can I get the assembly file version

In AssemblyInfo there are two assembly versions:

1. AssemblyVersion: Specify the version of the assembly being attributed.
2. AssemblyFileVersion: Instructs a compiler to use a specific version number for the Win32 file version resource. The Win32 file version is not required to be the same as the assembly's version number.

I can get the Assembly Version with the following line of code:

Version version = Assembly.GetEntryAssembly().GetName().Version; 

But how can I get the Assembly File Version?

5 Answers

See my comment above asking for clarification on what you really want. Hopefully this is it:

System.Reflection.Assembly assembly = System.Reflection.Assembly.GetExecutingAssembly(); System.Diagnostics.FileVersionInfo fvi = System.Diagnostics.FileVersionInfo.GetVersionInfo(assembly.Location); string version = fvi.FileVersion; 

There are three versions: assembly, file, and product. They are used by different features and take on different default values if you don't explicit specify them.

string assemblyVersion = Assembly.GetExecutingAssembly().GetName().Version.ToString(); string assemblyVersion = Assembly.LoadFile("your assembly file").GetName().Version.ToString(); string fileVersion = FileVersionInfo.GetVersionInfo(Assembly.GetExecutingAssembly().Location).FileVersion; string productVersion = FileVersionInfo.GetVersionInfo(Assembly.GetExecutingAssembly().Location).ProductVersion; 

When I want to access the application file version (what is set in Assembly Information -> File version), say to set a label's text to it on form load to display the version, I have just used

versionlabel.Text = "Version " + Application.ProductVersion; 

This approach requires a reference to System.Windows.Forms.

UPDATE: As mentioned by Richard Grimes in my cited post, @Iain and @Dmitry Lobanov, my answer is right in theory but wrong in practice.

As I should have remembered from countless books, etc., while one sets these properties using the [assembly: XXXAttribute], they get highjacked by the compiler and placed into the VERSIONINFO resource.

For the above reason, you need to use the approach in @Xiaofu's answer as the attributes are stripped after the signal has been extracted from them.

 public static string GetProductVersion() { var attribute = (AssemblyVersionAttribute)Assembly .GetExecutingAssembly() .GetCustomAttributes( typeof(AssemblyVersionAttribute), true ) .Single(); return attribute.InformationalVersion; } 

(From - as noted there, if you're looking for a different attribute, substitute that into the above)

Use this:

((AssemblyFileVersionAttribute)Attribute.GetCustomAttribute( Assembly.GetExecutingAssembly(), typeof(AssemblyFileVersionAttribute), false) ).Version; 

Or this:

new Version(System.Windows.Forms.Application.ProductVersion);