How do I share data between multiple ViewModels ?

For example there is a class named Project in application . 

    public class Project : ModelBase
{
    private string _projectName;

    public string ProjectName
    {
        get { return _projectName; }
        set
        {
            _projectName = value;
            RaisePropertyChanged(() => ProjectName);
        }
    }
}

In multiple ViewModels application should access ActiveProject.
What's the best way to share Project between ViewModels ?

  • Mediator Pattern ? (Messaging)
  • Static object
  • Singleton pattern (If yes how?)

I've used Messaging before but it needs much codding . For all ViewModels I've to create ActiveProject property and also have to register a messenger to update that.


I use MVVM Light framework.
Any code example would be appreciated.

c# wpf design-patterns mvvm
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