How To Remove Clickonce Application

Create Uninstall option for Click Once Deployed Application. Unforunately, ClickOnce Package does not provide an option to uninstall the Clickonce deployed application in the start program group. This article explains how to accomplish the same.

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I have a WinForms application that was going to use ClickOnce. But it turns out ClickOnce won't work for my application, so I'd like to remove it. Only..there doesn't seem to be an obvious way to do this. There's no 'Un-ClickOnce' button. Does anybody know what steps I need to take to get my app to be like it was before ClickOnce integrated itself?

(I know I can create a new project and import stuff into it, but it seems silly to have to do that, so I'm hoping there's another way.)

Ryan Lundy

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5 Answers

Other responses here are not correct or helpful. It is incorrect to state that it never needs removing.

One such example I experienced recently was when the application had a need for administrative privileges. Any attempt to embed administrative requirements into the manifest will result in the application not even compiling while ClickOnce is still present in the solution. https://reviewlucky.netlify.app/change-folder-background-windows-7.html.

The following two steps enabled me to turn off ClickOnce (in Visual Studio 2010):

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In the project properties,

Signing tab: Untick 'Sign the ClickOnce manifests'
Security tab: Untick 'Enable ClickOnce security settings'

Peter Mortensen

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Chris RogersChris Rogers

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I agree with the others, there is no need to 'remove ClickOnce'.

If you are really going for it though, IIRC all ClickOnce settings are in the .csproj file for the project, so remove all XML tags there that relate to ClickOnce. (maybe easiest to compare to a new app that hasn't been deployed with CO ever to see what tags are not there)

andyhammarandyhammar

If you refer the the ClickOnce Application Deployment Manifest files that appear in your Debug folder, go to Project Properties -> Security and uncheck 'Enable ClickOnce Security Settings'

You can also go to Project Properties -> Signing and uncheck 'Sign the ClickOnce manifests', but this is not necessary because it does not have what to sign if you do the first uncheck.

Now if you go to debug and delete .application files, at rebuild, there will not appear again.

Gabriel DiaconescuGabriel Diaconescu

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I believe the only thing that is left from ClickOnce once you stop deploying it is file publish.xml that tells you about what you have deployed thus far and what version you are at. Otherwise there is really nothing there that need concern you, just deploy from the bin folders as you would without ClickOnce.

Peter Mortensen

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Brandon GrossuttiBrandon Grossutti

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Just in case this helps anyone..

My problem was specifically that I had a dependant 'Class Library' project that had the 'sign the clickonce manifest' checked but disabled so it could not be unchecked. My solution was to:

Convert that project to a windows app,
Re-open the properties panel,
Remove the click once manifest signing from the signing tab on the properties panel,
Convert the project back to a 'Class Library'.

I consider it an MS bug (still in VS2019 16.0.1 which I'm using now) but the workaround fixed it.

Good Luck!

TonyT_32909023190TonyT_32909023190

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Installation of a ClickOnce application

ClickOnce is a component of Microsoft .NET Framework 2.0 and later, and supports deploying applications made with Windows Forms or Windows Presentation Foundation. It is similar to Java Web Start for the Java Platform or Zero Install for Linux.

Description[edit]

The core principle of ClickOnce is to ease the deployment of Windows applications. In addition, ClickOnce aims to solve three other problems with conventional deployment models: the difficulty in updating a deployed application, the impact of an application on the user's computer, and the need for administrator permissions to install applications.

ClickOnce-deployed applications are considered 'low impact', in that they are installed per user, not per machine. Administrator privileges are not required to install these applications. Each ClickOnce application is isolated from the others. This means one ClickOnce application is not able to 'break' another. ClickOnce employs Code Access Security (CAS) to prevent system functions being called by a ClickOnce application from the web, ensuring the security of data and the client system in general.

Applications[edit]

The ClickOnce model supports both installed applications (akin to conventional Windows applications with Start Menu integration) and online applications (browser-hosted applications that are not installed, only run and cached). ClickOnce applications can be deployed to a computer from an internet location, a network share, or a local file location such as a CD-ROM.

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The ClickOnce deployment technology has been integrated into Visual Studio 2005 and later. It is also natively supported by MSBuild, Microsoft's build management technology.

Manifests[edit]

A ClickOnce deployment is controlled through the use of two XMLmanifest files: a deployment manifest and an application manifest. The manifests are in the same XML format as the side-by-side assembly implementation. The deployment manifest (*.application file) describes the deployment model: the current version, update behavior, publisher identity along with a digital signature; this manifest is intended to be authored by administrators who handle deployment. The application manifest (*.exe.manifest file) describes the application assemblies, dependent libraries, and permissions required by the application. This file is intended to be authored by the application developer. In order to launch a ClickOnce application, a user clicks on its deployment manifest file.

Currently, ClickOnce will only launch if the URL to the deployment manifest is opened using Internet Explorer or Edge. If the deployment URL is launched from another application such as Outlook, Word, or Excel, the application launch will only be successful if Internet Explorer or Edge is set as the default browser.^[1]

Updates[edit]

ClickOnce applications can be self-updating. They can check for newer versions as they become available and automatically replace any updated files. Depending on the installation type, ClickOnce presents several update options. Applications can be configured to check for updates on startup or after startup. ClickOnce also exposes programmatic APIs to customize update behavior. There is also support for mandatory updates, ensuring that the entire user-base can be moved to a new version in a timely manner.

Security issues[edit]

ClickOnce applications cannot be installed from a password-protected web directory. This means it is not possible to create applications with restricted access while making them available on the internet.

Browser support[edit]

Native support for ClickOnce applications is only available via Internet Explorer and Edge.

With the release of .NET Framework 3.5 with Service Pack 1, Microsoft included a Firefox add-on called .NET Framework Assistant that enabled ClickOnce support in Firefox 3 and later.^[2] The first release of this extension had a problem that prevented users from uninstalling the add-on in the same manner that other add-ons are uninstalled; the corresponding Uninstall button in the Add-ons dialog box was disabled.^[3] Hotspot shield elite crack. On 6 May 2009, Microsoft released an update that addressed this problem and also published a support article that helped users manually remove this component. In addition, the later versions of Microsoft .NET Framework Assistant included with Windows 7 and .NET Framework 4 did not have this issue.^[4]

Other browsers may have third-party extensions available that add ClickOnce support such as Menarva Ltd's ClickOnce for Google Chrome.

Remove One Click Office

XAML Browser Applications (XBAP)

References[edit]