Step 1: Click New Project, then select Visual C# on the left, then Windows and then select Windows Forms Application. Name your project "AutoUpdate" and then click OK
Step 2: Design a simple form as below

Step 3: Add code to handle button event
private void button1_Click(object sender, EventArgs e)
{
UpdateCheckInfo info;
if (ApplicationDeployment.IsNetworkDeployed)
{
ApplicationDeployment ad = ApplicationDeployment.CurrentDeployment;
try
{
info = ad.CheckForDetailedUpdate();
}
catch (DeploymentDownloadException dde)
{
MessageBox.Show("The new version of the application can't be downloaded at this time.\n\nPlease check your network connection or try again later. Error: " + dde.Message, "Message", MessageBoxButtons.OK, MessageBoxIcon.Error);
return;
}
catch (InvalidDeploymentException ide)
{
MessageBox.Show("Can't check for a new version of the application. The ClickOnce deployment is corrupt. Please redeploy the application and try again. Error: " + ide.Message, "Message", MessageBoxButtons.OK, MessageBoxIcon.Error);
return;
}
catch (InvalidOperationException ioe)
{
MessageBox.Show("This application can't be updated. It's likely not a ClickOnce application. Error: " + ioe.Message, "Message", MessageBoxButtons.OK, MessageBoxIcon.Error);
return;
}
if (info.UpdateAvailable)
{
if (MessageBox.Show("A newer version is available. Would you like to update it now ?", "Message", MessageBoxButtons.YesNo, MessageBoxIcon.Question) == DialogResult.Yes)
{
try
{
ad.Update();
Application.Restart();
}
catch (Exception ex)
{
MessageBox.Show(ex.Message, "Message", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
}
}
else
MessageBox.Show("You are running the latest version.", "Message", MessageBoxButtons.OK, MessageBoxIcon.Information);
}
}
VIDEO TUTORIALS