Automatic updates for windows client applications (Winforms/WPF)

ClientApplication.cs

var updateServer = new UpdateServer("https://updateserver.com/updates");
var versionInfo = s.GetVersionInfo("TestApplication");

if (versionInfo.Version > ApplicationVersion) 
{
    MessageBox.Show("An update for your application is available");
}

ClientApplication2.cs

s.GetVersionInfo("TestApplication", new string[] {LicenseKey});

CreatePackage.ps1

create-update Application.msi --version 1.0 --name "Test Application" 
--key private_key_file --out path_to_update_server_dir

Webservice.cs

public VersionInfo GetVersionInfo(string applicationName, string[] additionalInfo)
{
    // check for an application specific handler
    if (handlers.ContainsKey(applicationName) 
    {
        // this may require a license key and throw an exception if none is provided
        return handlers[applicationName](applicationName, additionalInfo);
    }

    // to avoid problems on the client side, this should alwyas return a VersionInfo object
    return GetVersionInfoFromXml(applicationName, additionalInfo);
]