Begins an asynchronous operation to unsubscribe the underlying subscription.

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

Syntax

Visual Basic (Declaration) 
Public 
Overrides 
Function 
BeginUnsubscribe ( _
	
userCallback 
As 
AsyncCallback, _
	
state 
As 
Object _
) 
As 
IAsyncResult
C# 
public 
override 
IAsyncResult 
BeginUnsubscribe(
	
AsyncCallback 
userCallback,
	
Object 
state
)
Visual C++ 
public:
virtual 
IAsyncResult^ 
BeginUnsubscribe(
	
AsyncCallback^ 
userCallback, 
	
Object^ 
state
) 
override
JavaScript 
function 
beginUnsubscribe(
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.

Remarks

If no underlying subscription exists, then this operation completes immediately.

See Also