Gets or sets a value indicating whether calls to async methods of the current document source expect the async/await pattern to be used by the calling code. If this property is true, then the *Completed events (such as GenerateCompleted, GenerateCompleted and others) do not fire.

'宣言
 
Public Property AsyncMethodsUseAwaitPattern As System.Boolean

public System.bool AsyncMethodsUseAwaitPattern {get; set;}