Begins an asynchronous operation to refresh the underlying subscription.

Namespace:  Microsoft.Rtc.Collaboration.Presence
Assembly:  Microsoft.Rtc.Collaboration(in Microsoft.Rtc.Collaboration.dll)

Syntax

Visual Basic (Declaration) 
Public 
Overridable 
Function 
BeginRefresh ( _
	
userCallback 
As 
AsyncCallback, _
	
state 
As 
Object _
) 
As 
IAsyncResult
C# 
public 
virtual 
IAsyncResult 
BeginRefresh(
	
AsyncCallback 
userCallback,
	
Object 
state
)
Visual C++ 
public:
virtual 
IAsyncResult^ 
BeginRefresh(
	
AsyncCallback^ 
userCallback, 
	
Object^ 
state
)
JavaScript 
function 
beginRefresh(
userCallback, 
state);

Parameters

userCallback
Type: AsyncCallback
The method to be called when the asynchronous operation is completed.
state
Type: Object
A user-provided object that distinguishes this particular asynchronous operation from other asynchronous operations.

Return Value

An IAsyncResult that references the asynchronous operation.

Exceptions

Exception Condition
InvalidOperationException Thrown when this method is invoked before the subscription is established.

See Also