Public Overloads Function SaveChangesAsync( _
   ByVal userCallback As Action(Of EntitySaveOperation), _
   Optional ByVal userState As Object _
) As EntitySaveOperation

Dim instance As EntityManager
Dim userCallback As Action(Of EntitySaveOperation)
Dim userState As Object
Dim value As EntitySaveOperation
 
value = instance.SaveChangesAsync(userCallback, userState)

public EntitySaveOperation SaveChangesAsync( 
   Action<EntitySaveOperation> userCallback,
   object userState
)

public:
EntitySaveOperation^ SaveChangesAsync( 
   Action<EntitySaveOperation^>^ userCallback,
   Object^ userState
) 

public void AsyncSaveSimple() {
  DomainModelEntityManager mgr = new DomainModelEntityManager();

  Customer c1 = new Customer() { CompanyName = "Toys R Us" };
  mgr.AddEntity(c1);
  Customer c2 = new Customer() { CompanyName = "Apple" };
  mgr.AddEntity(c2);

  // Save all modified entities using default SaveOptions.
  // Use a lambda expression which takes the EntitySaveOperation.
  // The userstate token is left null since it's optional.
  mgr.SaveChangesAsync(op => {
    SaveResult sr = op.SaveResult;
    MessageBox.Show(sr.Ok.ToString());
  }, null);
}