- (void)runModalSavePanelForSaveOperation:(NSSaveOperationType)saveOperation delegate:(id)delegate didSaveSelector:(SEL)didSaveSelector contextInfo:(void *)contextInfo {

    NSSavePanel*  savePanel = [NSSavePanel savePanel];

    [savePanel setCanCreateDirectories:YES];
    [savePanel setCanSelectHiddenExtension:NO];
    [savePanel setExtensionHidden:NO];
    [savePanel beginSheetModalForWindow:[self windowForSheet] completionHandler:^(NSInteger result)
     {
         if(result==NSOKButton)
         {
             dispatch_async(dispatch_get_main_queue(), ^{
                 NSCAssert(savePanel!=nil,@"panel is nil");

                 [self performActivityWithSynchronousWaiting:NO usingBlock:^(void(^activityCompletationHandler)(void)) {
                NSData* data= [self dataOfType:[self fileType] error:nil];
                 NSError* error;
                 BOOL successful=[data writeToURL:[[savePanel URL] URLByAppendingPathExtension:@"rc"] options:NSSaveOperation error:&error];
                 if(!successful)
                 {
                     NSAlert* alert=[NSAlert alertWithError: error];
                     [alert runModal];
                 }
             }];
             });
         }}];

}