“Unable to find manifest signing certificate in the certificate store” - even when add new key

Question

I've finally found the solution and really hope this helps someone else too.

1. Edit the .csproj file for the project in question.

2. Delete the following lines of code:

   <PropertyGroup>
      <ManifestCertificateThumbprint>...........</ManifestCertificateThumbprint>
   </PropertyGroup>
   <PropertyGroup>
      <ManifestKeyFile>xxxxxxxx.pfx</ManifestKeyFile>
   </PropertyGroup>
   <PropertyGroup>
      <GenerateManifests>true</GenerateManifests>
   </PropertyGroup>
   <PropertyGroup>
      <SignManifests>false</SignManifests>
   </PropertyGroup>
   

Go to your project's "Properties" within visual studio. Then go to signing tab.

Then make sure Sign the Click Once manifests is turned off.

---

Updated Instructions:

Within your Solution Explorer:

1. right click on your project
2. click on properties
3. usually on the left-hand side, select the "Signing" tab
4. check off the Sign the ClickOnce manifests
5. Make sure you save!

It's simple!!

I resolved this problem by following this steps:

1. Open project properties
2. Click on Signing Tab
3. And uncheck "Sign the assembly"

That's it!!

1. Open the .csproj file in Notepad.

2. Delete the following information related to signing certificate in the certificate store

   <PropertyGroup>
     <ManifestCertificateThumbprint>xxxxx xxxxxx</ManifestCertificateThumbprint>
     <ManifestKeyFile>xxxxxxxx.pfx</ManifestKeyFile>
   <GenerateManifests>true</GenerateManifests>
   <SignManifests>false</SignManifests>
   </PropertyGroup>
   

Try this: Right click on your project -> Go to properties -> Click signing which is left side of the screen -> Uncheck the Sign the click once manifests -> Save & Build

Go to your projects "Properties" within visual studio. Then go to signing tab.

Then make sure Sign the Click Once manifests is turned off.

OR

1.Open the .csproj file in Notepad.

2.Delete the following information related to signing certificate in the certificate store xxxxx xxxxxx xxxxxxxx.pfx true false `

Worked for me.

Assuming this is a personal certificate created by windows on the system you copied your project from, you can use the certificate manager on the system where the project is now and import the certificate. Start the certificate manager (certmgr) and select the personal certificates then right click below the list of existing certificates and select import from the tasks. Use the browse to find the .pfx in the project (the .pfx from the previous system that you copied over with the project). It should be in the sub-directory with the same name as the project directory. I am familiar with C# and VS, so if that is not your environment maybe the .pfx will be elsewhere or maybe this suggestion does not apply. After the import you should get a status message. If you succeeded, the compile certificate error should be gone.