How do I get the version number of each DLL that has my MEF plugins?

Question

I\'ve got a number of classes which implement IDessertPlugin. These are found in various DLLs which I use MEF to spin up instances of them to use as plug-in functi

Answer 1

So, the solution to my problem was pretty straightforward after the parts have been composed. I was trying to dig down into the MEF objects themselves rather than look into the container that holds all the plug-ins I've loaded. The answer was to totally ignore the fact of how those plug-ins were being loaded and just look at the instantiated objects themselves.

My plugin managing code has an entry like so:

[ImportMany(typeof(IDessertPlugin)]
private IEnumerable<IDessertPluing> dessertPlugins;

and once the container parts composition has taken place, I could iterate through my plug-ins like so:

foreach(var plugin in dessertPlugins)
{
   Console.WriteLine(Assembly.GetAssembly(plugin.GetType()).GetName().Version.ToString());
}

Answer 2

You can get assembly info from different properties AssemblyVersion, AssemblyFileVersion and AssemblyDescription.

                /// <summary>
                /// This class provide inforamtion about product version.
                /// </summary>
                public class ProductVersion
                {
                    private readonly FileVersionInfo fileVersionInfo;

                    private readonly AssemblyName assemblyName;


                    private ProductVersion(Type type)
                    {
                        // it done this way to prevent situation 
                        // when site has limited permissions to work with assemblies.
                        var assembly = Assembly.GetAssembly(type);
                        fileVersionInfo = FileVersionInfo.GetVersionInfo(assembly.Location);
                        assemblyName = new AssemblyName(assembly.FullName);
                    }

                    public string AssemblyFileVersion
                    {
                        get
                        {
                            return fileVersionInfo.FileVersion;
                        }
                    }

                    public string AssemblyVersion
                    {
                        get
                        {
                            return assemblyName.Version.ToString();
                        }
                    }



                }