/// <remarks/>
 public void OptOutEmailAsync(OptOutEmailRequest OptOutEmailRequest, object userState) {
     if ((this.OptOutEmailOperationCompleted == null)) {
         this.OptOutEmailOperationCompleted = new System.Threading.SendOrPostCallback(this.OnOptOutEmailOperationCompleted);
     }
     this.InvokeAsync("OptOutEmail", new object[] {
                 OptOutEmailRequest}, this.OptOutEmailOperationCompleted, userState);
 }
 /// <remarks/>
 public void OptOutEmailAsync(OptOutEmailRequest OptOutEmailRequest) {
     this.OptOutEmailAsync(OptOutEmailRequest, null);
 }