C# ClickOnce发布方式

             1
            private
            void button1_Click(object sender, EventArgs e)
 2        {
 3if (ApplicationDeployment.IsNetworkDeployed)
 4            {
 5                 ApplicationDeployment.CurrentDeployment.CheckForUpdateCompleted +=
 6                   (sender1, e1) =>
 7                  {
 8if (e1.UpdateAvailable)
 9                      {
10                           ApplicationDeployment.CurrentDeployment.UpdateCompleted +=
11                     (sender2, e2) =>
12                        {
13                             MessageBox.Show("Update completed");
14                        };
15                          ApplicationDeployment.CurrentDeployment.UpdateAsync();
16                      }
17else18                      {
19                           MessageBox.Show("No update available");
20                      }
2122                  };
23                ApplicationDeployment.CurrentDeployment.CheckForUpdateAsync();
24            }
25         }