WPF C#


             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
 xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
 Title="DragAndDrop" Height="350" Width="550">
 
 Drag from this TextBox
  MouseDown="lblSource_MouseDown">Or this Label
  VerticalAlignment="Center" HorizontalAlignment="Center" Padding="20"
 AllowDrop="True" Drop="lblTarget_Drop">To this Label
 

//File:Window.xaml.cs
using System;
using System.Collections.Generic;
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.Shapes;
namespace RoutedEvents
{
 public partial class DragAndDrop : System.Windows.Window
 {
 public DragAndDrop()
 {
 InitializeComponent();
 }
 private void lblSource_MouseDown(object sender, MouseButtonEventArgs e)
 {
 Label lbl = (Label)sender;
 DragDrop.DoDragDrop(lbl, lbl.Content, DragDropEffects.Copy);
 }
 private void lblTarget_Drop(object sender, DragEventArgs e)
 {
 ((Label)sender).Content = e.Data.GetData(DataFormats.Text);
 }
 private void lblTarget_DragEnter(object sender, DragEventArgs e)
 {
 if (e.Data.GetDataPresent(DataFormats.Text))
 e.Effects = DragDropEffects.Copy;
 else
 e.Effects = DragDropEffects.None;
 }
 }
}