在App.xaml文件中添加xmlns:c4f="clr-namespace:Coding4Fun.Toolkit.Controls;assembly=Coding4Fun.Toolkit.Controls"        
         
     
                  
                       
                        
                            
                                 
                                  
                                  
                              
                         
                    
               
          
     

后台添加：MessagePrompt textBoxMsgPrompt = new MessagePrompt();            textBoxMsgPrompt.Template = Application.Current.Resources["MsgPropmtNoBorder"] as ControlTemplate;