/// <remarks/>
 public void ModifyCustomerAccountHistoryAsync(ModifyCustomerAccountHistoryRequest ModifyCustomerAccountHistoryRequest, object userState) {
     if ((this.ModifyCustomerAccountHistoryOperationCompleted == null)) {
         this.ModifyCustomerAccountHistoryOperationCompleted = new System.Threading.SendOrPostCallback(this.OnModifyCustomerAccountHistoryOperationCompleted);
     }
     this.InvokeAsync("ModifyCustomerAccountHistory", new object[] {
                 ModifyCustomerAccountHistoryRequest}, this.ModifyCustomerAccountHistoryOperationCompleted, userState);
 }
 /// <remarks/>
 public void ModifyCustomerAccountHistoryAsync(ModifyCustomerAccountHistoryRequest ModifyCustomerAccountHistoryRequest) {
     this.ModifyCustomerAccountHistoryAsync(ModifyCustomerAccountHistoryRequest, null);
 }