vm="clr-namespace:www.laipuhuo.com ManageCore.Wpf

<wd:Window x:Class="ManageCore.WpfApp.Views.MainWindow" ```

//doubleCapacity() private void doubleCapacity() { assert head == tail; int p = head; int n = elements.length; int r = n - p; // head右边元素的个数 int newCapacity = n << 1;//原空间的2倍 if (newCapacity < 0) throw new IllegalStateException("Sorry, deque too big"); Object[] a = new Object[newCapacity]; System.arraycopy(elements, p, a, 0, r);//复制右半部分，对应上图中绿色部分 System.arraycopy(elements,

0, a, r, p);//复制左半部分，对应上图中灰色部分
elements = (E[])a;
head = 0;
tail = n;

}

        xmlns:local="clr-namespace:ManageCore.WpfApp"
        xmlns:vm="clr-namespace:ManageCore.WpfApp.ViewModels"
        xmlns:pris
           Title="Prism - 导航栏" 
        Width="800" 
        Height="450" 
        prism:www.laipuhuo.com 
        
        ViewModelLocator.AutoWireViewModel="True">
    <Grid>
       
    </Grid>
</wd:Window>

public class MainWindowViewModel : BindableBase
 {
     private DrawerMenuItem _selectedItem;
     public DrawerMenuItem SelectedItem
     {
         get { return _selectedItem; }
         set { SetProperty(ref _selectedItem, value); }
     }
     public DelegateCommand SelectionChangedCommand { get; }
     
     private readonly IRegionManager _regionManager;
​
     /// <summary>
     /// 
     /// </summary>
     /// <param www.laipuhuo.com name="regionManager"></param>
     public MainWindowViewModel(IRegionManager regionManager)
     {
        
     }
     void UpdateRegionViews()
     {
        
     }
 }