基本思路很简单：

先得到鼠标点击的位置并记录，鼠标移动时得到移动后的位置计算出差值，然后平移。

代码：

    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 DragWindowTest        {            /// <summary>            /// MainWindow.xaml 的交互逻辑            /// </summary>            public partial class MainWindow : Window            {                public MainWindow()                {                    InitializeComponent();                }                private static bool IsDrag = false;                private double enterX;                private double enterY;                private void Window_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)                {                    IsDrag = true;                    enterX = e.GetPosition(this).X;                    enterY = e.GetPosition(this).Y;                }                        private void Window_MouseLeftButtonUp(object sender, MouseButtonEventArgs e)                {                    IsDrag = false;                    enterX = 0;                    enterY = 0;                }                private void Window_MouseMove(object sender, MouseEventArgs e)                {                    if (IsDrag)                    {                        this.Left += e.GetPosition(this).X - enterX;                        this.Top += e.GetPosition(this).Y - enterY;                    }                }                     }        }