Public Overloads Function InvokeServerMethodAsync( _
   ByVal fullTypeName As String, _
   ByVal methodName As String, _
   ByVal userCallback As Action(Of InvokeServerMethodOperation), _
   ByVal userState As Object, _
   ByVal ParamArray userArguments() As Object _
) As InvokeServerMethodOperation

Dim instance As EntityManager
Dim fullTypeName As String
Dim methodName As String
Dim userCallback As Action(Of InvokeServerMethodOperation)
Dim userState As Object
Dim userArguments() As Object
Dim value As InvokeServerMethodOperation
 
value = instance.InvokeServerMethodAsync(fullTypeName, methodName, userCallback, userState, userArguments)

public InvokeServerMethodOperation InvokeServerMethodAsync( 
   string fullTypeName,
   string methodName,
   Action<InvokeServerMethodOperation> userCallback,
   object userState,
   params object[] userArguments
)

public:
InvokeServerMethodOperation^ InvokeServerMethodAsync( 
   String^ fullTypeName,
   String^ methodName,
   Action<InvokeServerMethodOperation^>^ userCallback,
   Object^ userState,
   ... array<Object^>^ userArguments
) 

// Sample showing asynchronous invocation of server method

// In client class:
private void MakeAsyncCall() {
  EntityManager mgr = new DomainModelEntityManager();
  // Make async call
  Guid myToken = Guid.NewGuid();
  mgr.InvokeServerMethodAsync(new ServerMethodDelegate(Order.GetNumberOfOrdersSlow), 
      InvokeServerMethodAsyncCompleted, myToken, 
 	    new DateTime(1995, 1, 1), new DateTime(1999, 1, 1));
}
private void InvokeServerMethodAsyncCompleted(InvokeServerMethodOperation e) {
  Guid token = (Guid)e.UserState;
  if (!e.Cancelled) {
     MessageBox.Show("my async result = " + Convert.ToInt32(e.Result).ToString());
  }
}

// Sample method defined in Order entity class:
public class Order {
//...

  // ServerMethodDelegate method, called from client
  [AllowRpc]
  public static Object GetNumberOfOrdersSlow(IPrincipal pPrincipal, EntityManager pMgr, params Object[] pArgs) {
     // Sleep to make this slower to show async
     System.Threading.Thread.Sleep(2000);
     DateTime dt1 = pArgs[0] as DateTime;
     DateTime dt2 = pArgs[1] as DateTime;
     return pMgr.Order.Where(o => o.OrderDate >= dt1 && o.OrderDate <= dt2).Count();
  }
}