I\'ve developed a .net 3.0 application, which is deployed using clickonce.
I\'d like to move from full trust to partial trust to ease deployment.
I\'ve tried
The exception message is telling you why you can't run with partial trust:
System.Security.Permissions.SecurityAction.LinkDemand
If you copy and paste that into Google, you will find several relevant articles on MSDN that might help you to discover why your application requires full trust.