The IDispatcherService interface has been changed

The DevExpress.Mvvm.IDispatcherService interface has been changed. Previously it had a single void method for executing actions.

C#
public interface IDispatcherService {  
    void BeginInvoke(Action action);  
}  

Visual Basic
Public Interface IDispatcherService
    Sub BeginInvoke(ByVal action As Action)
End Interface

We have wrapped the BeginInvoke method in Task and added an Invoke void method.

C#
public interface IDispatcherService {  
    Task BeginInvoke(Action action);  
    void Invoke(Action action);  
}

Visual Basic
Public Interface IDispatcherService
    Function BeginInvoke(ByVal action As Action) As Task
    Sub Invoke(ByVal action As Action)
End Interface

This change allows you to use the DispatcherService to perform actions in a ViewModel asynchronously using the await operator. See the example below:

C#
using DevExpress.Mvvm;

await DispatcherService.BeginInvoke(() => {
    // action
});

Visual Basic
Imports DevExpress.Mvvm

Await DispatcherService.BeginInvoke(Sub()  
    '...  
End Sub)

Use the DispatcherService.Invoke void method to execute actions synchronously.