在不同的程序集中共享应用程序数据

我建议您使用MEF从不同的DLL导入和导出信息。每个DLL都可以拥有用于提供视图的资源(如XAML文件)。所以，我的选择是MVVM + MEF模块化+ Prism EventAggregator模块之间的交互。一些示例，仅用于概念演示:

类似于"单例管理器":

public class AddinsManager : IAddinsManager
{
    [ImportMany(typeof(IModule))]
    private OrderingCollection<IModule, IOrderMetadata> modules = new OrderingCollection<IModule, IOrderMetadata>(lazyRule => lazyRule.Metadata.Order);
    private CompositionContainer container;
    private bool isInitialized = false;
    /// <summary>
    /// Gets available application modules (add-ins)
    /// </summary>
    public List<IModule> Modules { get; private set; }
    /// <summary>
    /// Initialize manager
    /// </summary>
    public void Initialize()
    {
        Assembly oAssembly = Assembly.GetAssembly(Application.Current.GetType());
        this.container = new CompositionContainer(GetCatalog(oAssembly));
        this.container.ComposeParts(this, Context.Current);
        this.Modules = this.modules
                            .Select(lazy => lazy.Value)
                            .ToList();
        this.isInitialized = true;
    }
    /// <summary>
    /// Initialize modules
    /// </summary>
    public void InitializeModules()
    {
        foreach (IModule oModule in this.Modules)
        {
            oModule.Initialize();
        }
    }
    /// <summary>
    /// Injects dependencies in specified container
    /// </summary>
    /// <param name="host">Container to inject in</param>
    public void Compose(object host)
    {
        if (host == null)
        {
            throw new ArgumentNullException();
        }
        this.EnsureInitialize();
        this.container.ComposeParts(host);
    }
    /// <summary>
    /// Register views of the modules
    /// </summary>
    public void RegisterViews()
    {
        this.EnsureInitialize();
        foreach (IModule oModule in this.Modules)
        {
            foreach (Uri oUri in oModule.GetViewPath().ToArray())
            {
                ResourceDictionary oDictionary = new ResourceDictionary();
                oDictionary.Source = oUri;
                Application.Current.Resources.MergedDictionaries.Add(oDictionary);
            }
        }
    }
    /// <summary>
    /// Get catalog for modules load
    /// </summary>
    /// <param name="assembly">Assembly to search modules</param>
    /// <returns>Catalog for modules load</returns>
    private static AggregateCatalog GetCatalog(Assembly assembly)
    {
        string sDirName = Path.GetDirectoryName(assembly.Location);
        DirectoryCatalog oDirCatalog = new DirectoryCatalog(sDirName, "Company.*");
        AssemblyCatalog oAssemblyCatalog = new AssemblyCatalog(assembly);
        AggregateCatalog oCatalog = new AggregateCatalog(oAssemblyCatalog, oDirCatalog);
        return oCatalog;
    }
    /// <summary>
    /// Ensure if manager was initialized
    /// </summary>
    private void EnsureInitialize()
    {
        if (!this.isInitialized)
        {
            throw new Exception("Add-ins Manager Component not initialized");
        }
    }
}

模块(单独项目的DLL)实现

[Export(typeof(IModule))]
public class LayoutsModule : AModule
{
    private static LayoutsVM viewModel;
    /// <summary>
    /// Gets reporting add-in main view model
    /// </summary>
    public static LayoutsVM ViewModel
    {
        get
        {
            if (viewModel == null)
            {
                viewModel = Context
                                .Current
                                .LayoutManager
                                .ModulesVM
                                .OfType<LayoutsVM>()
                                .FirstOrDefault();
            }
            return viewModel;
        }
    }
    /// <summary>
    /// Initialize module
    /// </summary>
    public override void Initialize()
    {
        Context
            .Current
            .EventAggregator
            .GetEvent<MenuInitializing>()
            .Subscribe(this.InitializeMenu);
        base.Initialize();
    }
}

在每个DLL上以嵌入资源(View.xaml)的形式查看。

<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
                    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
                    xmlns:vm="clr-namespace:Company.Client.ViewModels">
    <DataTemplate DataType="{x:Type vm:ApplicationVM}">
        <ContentPresenter Content="{Binding AddinsViewModel}" />
    </DataTemplate>
    <DataTemplate DataType="{x:Type vm:MenuVM}">        
        <ContentPresenter Content="{Binding RibbonData}" />
    </DataTemplate>
</ResourceDictionary>