There have been a number of posts on the forums lately about problems with log4net.dll and other files like CrystalDecisions.ReportAppServer.CommonObjectModel. These have all been tied together with ClickOnce deployments, or adding the Crystal Reports for Visual Studio 2010 runtime as a prerequisite.
I recently found some settings in Visual Studio that have an impact on this.
- Go into your project Properties.
- Then go to the Publish tab.
- Click the Application Files button.
- Select to Exclude any file with CrystalDecisions or BusinessObjects in the name. Plus exclude log4net.dll.
- Click OK
- Rebuild your application, then republish it to your site or file share to be installed by your clients.
See the attached screenshot for an example.
Let us know if this helps you out.
Happy holidays all!