WPF windows窗体最大化后四周会有一部分被遮挡

WPF windows窗体放大后四周会有一部分被遮挡，以下面的图标为例子，这是没有最大化下的样子：

可以看到窗体图标和边界的间隔，最大化之后是这样：

可以明显看到间隔变小了，有知道该怎么处理这种情况的吗，这是为什么

应该是和窗体风格有关，上面的是传统winforms的，下面是 modenui 风格的

• 帮你找了个相似的问题, 你可以看下: https://ask.csdn.net/questions/351578
• 除此之外, 这篇博客: 【WPF】自定义Windows窗口样式中的 4、对话框窗口 部分也许能够解决你的问题, 你可以仔细阅读以下内容或跳转源博客中阅读:
  
• 1. 前端代码DialogWindow.xaml

  <local:CustomWindow x:Class="CustomSystemWindow.CustomWindow.DialogWindow"
          xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
          xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
          xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
          xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
          xmlns:local="clr-namespace:CustomSystemWindow.CustomWindow"
          mc:Ignorable="d" Title="DialogWindow" Height="250" Width="460" >
      <Border Background="#15181C">
          <Grid>
              <Grid.RowDefinitions>
                  <RowDefinition Height="120"></RowDefinition>
                  <RowDefinition Height="90"></RowDefinition>
              </Grid.RowDefinitions>
              <TextBlock x:Name="MessageControl" Grid.Row="0" 
                         FontSize="14" Foreground="White" TextWrapping="Wrap"
                         VerticalAlignment="Center" HorizontalAlignment="Center"/>
              <Border Grid.Row="0" BorderBrush="#252A33" BorderThickness="1" 
                      VerticalAlignment="Bottom"></Border>
              <Grid Grid.Row="1" x:Name="YesNoControl" Visibility="Visible">
                  <Grid.ColumnDefinitions>
                      <ColumnDefinition Width="*"></ColumnDefinition>
                      <ColumnDefinition Width="*"></ColumnDefinition>
                  </Grid.ColumnDefinitions>
                  <Button Grid.Column="0" HorizontalAlignment="Right" 
                          Height="30" Width="150" Content="是" Foreground="White" 
                          Margin="0,0,10,0" Background="#434B59"
                          Click="OkButtonClick"/>
                  <Button Grid.Column="1" HorizontalAlignment="Left"
                          Height="30" Width="150" Content="否" Foreground="White" 
                          Margin="10,0,0,0" Background="#434B59"
                          Click="CancelButtonClick"/>
              </Grid>
              <Button Grid.Row="1" x:Name="OkControl" Visibility="Collapsed"
                      Height="30" Width="150" Content="确认" 
                      Foreground="White" Background="#434B59"
                      Click="ConfirmButtonClick"/>
          </Grid>
      </Border>
  </local:CustomWindow>
  
  

  2. 后端代码DialogWindow.xaml.cs

  using System.Windows;
  
  namespace CustomSystemWindow.CustomWindow
  {
      public partial class DialogWindow
      {
          public DialogWindow()
          {
              InitializeComponent();
          }
  
          public string Message
          {
              set { this.MessageControl.Text = value; }
              get { return this.MessageControl.Text; }
          }
  
          public static bool? Show(string title, string msg, MessageBoxButton category)
          {
              var msgBox = new DialogWindow();
              if (MessageBoxButton.OK == category)
              {
                  msgBox.YesNoControl.Visibility = Visibility.Collapsed;
                  msgBox.OkControl.Visibility = Visibility.Visible;
              }
              else if (MessageBoxButton.YesNo == category)
              {
                  msgBox.YesNoControl.Visibility = Visibility.Visible;
                  msgBox.OkControl.Visibility = Visibility.Collapsed;
              }
  
              msgBox.ResizeMode = ResizeMode.NoResize;
              msgBox.WindowStartupLocation = WindowStartupLocation.CenterScreen;
              msgBox.Title = title;
              msgBox.Message = msg;
  
              return msgBox.ShowDialog();
          }
  
          private void OkButtonClick(object sender, RoutedEventArgs e)
          {
              this.DialogResult = true;
              this.Close();
          }
  
          private void CancelButtonClick(object sender, RoutedEventArgs e)
          {
              this.DialogResult = false;
              this.Close();
          }
  
          private void ConfirmButtonClick(object sender, RoutedEventArgs e)
          {
              this.Close();
          }
      }
  }