AssemblyVersionTelemetryInitializer.cs

[PublicAPI]
public sealed class AssemblyVersionTelemetryInitializer : ITelemetryInitializer
{

    [CanBeNull] string _version;

    public void Initialize([CanBeNull] ITelemetry telemetry)
    {
        var component = telemetry?.Context?.Component;
        if (component == null)
            return;

        var version = LazyInitializer.EnsureInitialized(ref _version, GetVersion);
        component.Version = version;
    }

    [CanBeNull]
    static string GetAssemblyFileVersion([NotNull] Assembly assembly)
    {
        var assemblyFileVersionAttributes = assembly.GetCustomAttributes<AssemblyFileVersionAttribute>();
        return assemblyFileVersionAttributes?.FirstOrDefault()?.Version;
    }

    [CanBeNull]
    static string GetAssemblyInformationalVersion([NotNull] Assembly assembly)
    {
        var assemblyInformationalVersionAttributes = assembly.GetCustomAttributes<AssemblyInformationalVersionAttribute>();
        return assemblyInformationalVersionAttributes?.FirstOrDefault()?.InformationalVersion;
    }

    [NotNull]
    static string GetAssemblyVersion([NotNull] Assembly assembly)
    {
        return assembly.GetName().Version.ToString();
    }

    [NotNull]
    static string GetVersion()
    {
        var assembly = Assembly.GetEntryAssembly();
        return GetAssemblyInformationalVersion(assembly) ?? GetAssemblyFileVersion(assembly) ?? GetAssemblyVersion(assembly);
    }

}