system.unauthorizedaccessexception

[AlightChen]

[KevC0]

Same here. Error only occurs when the user doesn't have write/modify permission in the target directory of the application. In my case, when application is installed by an administrator in C:\Program Files\AppDir\ but user only has read/execute permission for that directory.

[ravibpatel]

You can change the path where it downloads the file as shown here.