.NET Security Blog

How about using System.Deployment.Application.ApplicationDeployment.CurrentDeployment.IsNetworkDeployed

MSDN Library states: "Gets a value indicating whether the current application is a ClickOnce application."

Interesting fact. :-)

But what sence does "IsNetworkDeployed" make then...?

-Neno

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The IsNetworkDeployed property is static, which means you don't need to access the CurrentDeployment property first. The documentation is correct - it returns true if the application is a ClickOnce application, and false otherwise. It has nothing to do with UNC vs CD deployment. However, looking at the IL for the property, it works by accessing the CurrentDeployment property and catching the InvalidDeploymentException. This would be quite an expensive call in a non-deployed application. Checking for a null ActivationContext is a much more efficient test. Perhaps the ApplicationDeployment class should be rewritten to avoid the exception? Something like this should do it: [PermissionSet(SecurityAction.Assert, Name="FullTrust")] private static ApplicationDeployment TryGetCurrentDeployment(out bool requireDemand) { requireDemand = false; if (null == _currentDeployment) { lock (lockObject) { if (null == _currentDeployment) { string appIdentity = null; ActivationContext context = AppDomain.CurrentDomain.ActivationContext; if (null != context) appIdentity = context.Identity.FullName; if (!string.IsNullOrEmpty(appIdentity)) { _currentDeployment = new ApplicationDeployment(appIdentity); requireDemand = true; } } } } return _currentDeployment; } public static ApplicationDeployment CurrentDeployment { get { bool requireDemand; ApplicationDeployment result = TryGetCurrentDeployment(out requireDemand); if (null == result) throw new InvalidDeploymentException(Resources.GetString("Ex_AppIdNotSet")); if (requireDemand) result.DemandPermission(); return result; } } public static bool IsNetworkDeployed { get { bool requireDemand; ApplicationDeployment result = TryGetCurrentDeployment(out requireDemand); if (null == result) return false; if (requireDemand) result.DemandPermission(); return true; } }

Hmm... the following works perfectly:

if (!ApplicationDeployment.IsNetworkDeployed)
{
 // ... and show warning if its not and abort startup...
 MessageBox.Show(Properties.Resources.NotNetworkDeployed, Application.ProductName, MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
 return;
}

IsNetworkDeployed returns false when running in debug, true if run via the application launcher (program group). As you would expect.

ActivationContext returns true even in debug mode...once you publish the application the first time. Even if you do not configure a URL to launch.

I can't use ActivationContext to verify the current deployment, because it fails if not network deployed:

ApplicationDeployment deploy = ApplicationDeployment.CurrentDeployment;

How do you detect if you are running as a ClickOnce application?
ActivationContext
Well, use can use...