Bug in 4.0 beta, plugin deletion

We should use this

if(pluginDescriptor.OriginalAssemblyFile.Directory.Exists)
    CommonHelper.DeleteDirectory(pluginDescriptor.OriginalAssemblyFile.DirectoryName);

instead of this

if(pluginDescriptor.OriginalAssemblyFile.Directory.Exists)
    CommonHelper.DeleteDirectory(pluginDescriptor.OriginalAssemblyFile.FullName);

according to https://msdn.microsoft.com/en-us/library/c1sez4sc(v=vs.110).aspx

since the current code gives this error "The specified path is invalid"

It is in pluginmanager.cs line 821

Since the DeleteDirectory funtion uses Directory.GetDirectories(path), we need to pass the folder path and not the path to the file in the folder.

Yes, you are right, I fixed this issue, thank you for your help. Please see this commit for more details