WPF(附加属性）

<Window x:Class="TestOfAttachProperty.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="MainWindow" Height="350" Width="525">
    <StackPanel >
        <Button Content="OK" Click="Button_Click" />
    </StackPanel>
</Window>

using System.Windows;

namespace TestOfAttachProperty
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
        }

        private void Button_Click(object sender, RoutedEventArgs e)
        {
            Human human = new Human();
            School.SetGrade(human, 6);
            int grade = School.GetGrade(human);
            MessageBox.Show(grade.ToString());
        }
    }

    public class School:DependencyObject
    {

        public static int GetGrade(DependencyObject obj)
        {
            return (int)obj.GetValue(GradeProperty);
        }

        public static void SetGrade(DependencyObject obj, int value)
        {
            obj.SetValue(GradeProperty, value);
        }

        // Using a DependencyProperty as the backing store for Grade.  This enables animation, styling, binding, etc...
        public static readonly DependencyProperty GradeProperty =
            DependencyProperty.RegisterAttached("Grade", typeof(int), typeof(School), new UIPropertyMetadata(0));


    }

    public class Human:DependencyObject
    {
        
    }
}

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C#代码写布局

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;

namespace TestOfGridCSharp
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();

            InitializeLayout();
        }

        private void InitializeLayout()
        {
            // 构造Grid
            Grid grid = new Grid()
                            {
                                ShowGridLines = true
                            };

            // 定义Grid
            grid.ColumnDefinitions.Add(new ColumnDefinition());
            grid.ColumnDefinitions.Add(new ColumnDefinition());
            grid.ColumnDefinitions.Add(new ColumnDefinition());

            grid.RowDefinitions.Add(new RowDefinition());
            grid.RowDefinitions.Add(new RowDefinition());
            grid.RowDefinitions.Add(new RowDefinition());

            // 初始化Button
            Button button = new Button()
                                {
                                    Content = "OK"
                                };

            // 设置Button位置
            Grid.SetColumn(button,1);
            Grid.SetRow(button,1);

            // 将按钮放入Grid中
            grid.Children.Add(button);

            // 将Grid放入窗体中
            this.Content = grid;
        }        
    }
}