1.Sorry English is poor,butneedexpert advice
Download thesource code to run, click the HideToolbarwant toexpandwill not be able toexpandagain,thecauseofthe eventfailsbecause intheMainWindow.xamlfileForm PropertiesAllowsTransparency = "True"removethe propertyeither
Download thesource code to run, click the HideToolbarwant toexpandwill not be able toexpandagain,thecauseofthe eventfailsbecause intheMainWindow.xamlfileForm PropertiesAllowsTransparency = "True"removethe propertyeither
http://files.cnblogs.com/myshuba/Test.rar SourceDownload