System 2.0.0.0 4.0.0.0 System.EventArgs To be added. Provides data for the event. Constructor 2.0.0.0 4.0.0.0 To be added. Initializes a new instance of the class. The percentage of an asynchronous task that has been completed. A unique user state. Property 2.0.0.0 4.0.0.0 System.Int32 To be added. The property determines what percentage of an asynchronous task has been completed. Gets the asynchronous task progress percentage. Property 2.0.0.0 4.0.0.0 System.Object To be added. To be added. Gets a unique user state.